Dear Editor,This letter deals with the distributed recursive set-membership filtering(DRSMF)issue for state-saturated systems under encryption-decryption mechanism.To guarantee the data security,the encryption-decrypt...Dear Editor,This letter deals with the distributed recursive set-membership filtering(DRSMF)issue for state-saturated systems under encryption-decryption mechanism.To guarantee the data security,the encryption-decryption mechanism is considered in the signal transmission process.Specifically,a novel DRSMF scheme is developed such that,for both state saturation and encryption-decryption mechanism,the filtering error(FE)is limited to the ellipsoid domain.Then,the filtering error constraint matrix(FECM)is computed and a desirable filter gain is derived by minimizing the FECM.Besides,the bound-edness evaluation of the FECM is provided.展开更多
This paper analyzes the problems in image encryption and decryption based on chaos theory. This article introduces the application of the two-stage Logistic algorithm in image encryption and decryption, then by inform...This paper analyzes the problems in image encryption and decryption based on chaos theory. This article introduces the application of the two-stage Logistic algorithm in image encryption and decryption, then by information entropy analysis it is concluded that the security of this algorithm is higher compared with the original image;And a new image encryption and decryption algorithm based on the combination of two-stage Logistic mapping and <i>M</i> sequence is proposed. This new algorithm is very sensitive to keys;the key space is large and its security is higher than two-stage Logistic mapping of image encryption and decryption technology.展开更多
A basic procedure for transforming readable data into encoded forms is encryption, which ensures security when the right decryption keys are used. Hadoop is susceptible to possible cyber-attacks because it lacks built...A basic procedure for transforming readable data into encoded forms is encryption, which ensures security when the right decryption keys are used. Hadoop is susceptible to possible cyber-attacks because it lacks built-in security measures, even though it can effectively handle and store enormous datasets using the Hadoop Distributed File System (HDFS). The increasing number of data breaches emphasizes how urgently creative encryption techniques are needed in cloud-based big data settings. This paper presents Adaptive Attribute-Based Honey Encryption (AABHE), a state-of-the-art technique that combines honey encryption with Ciphertext-Policy Attribute-Based Encryption (CP-ABE) to provide improved data security. Even if intercepted, AABHE makes sure that sensitive data cannot be accessed by unauthorized parties. With a focus on protecting huge files in HDFS, the suggested approach achieves 98% security robustness and 95% encryption efficiency, outperforming other encryption methods including Ciphertext-Policy Attribute-Based Encryption (CP-ABE), Key-Policy Attribute-Based Encryption (KB-ABE), and Advanced Encryption Standard combined with Attribute-Based Encryption (AES+ABE). By fixing Hadoop’s security flaws, AABHE fortifies its protections against data breaches and enhances Hadoop’s dependability as a platform for processing and storing massive amounts of data.展开更多
A new encryption/decryption system for optical information security is proposed in this paper. We used an iterative Fourier transform algorithm to optimize the encrypted hologram as well as the decryption key as phase...A new encryption/decryption system for optical information security is proposed in this paper. We used an iterative Fourier transform algorithm to optimize the encrypted hologram as well as the decryption key as phase-only elements. The optical decryption was implemented by superimposing the encrypted hologram and the decryyption key in a simple optical setup. Numerical simulation and optical experiment have confirmed the proposed technique as a simple and easy implementation for optical decryption, demonstrating potential applications in optical information security verification.展开更多
Any linear transform matrix can be used to easily calculate a consistent form, and a plurality of conversion can be easily connected together by matrix multiplication. When performing file transfers, you can encrypt f...Any linear transform matrix can be used to easily calculate a consistent form, and a plurality of conversion can be easily connected together by matrix multiplication. When performing file transfers, you can encrypt files matrix transformation. Article presents a matrix-based electronic document encryption and decryption algorithm, which relies on a special class of matrices combinatorial problems, the method to improve the security of electronic document system is feasible and effective, and finally give the source code and programming software.展开更多
Constructing an information storage or communication system, where countless pieces of information canbe hidden like a canvas and revealed on demand throughspecific stimuli or decoding rules, is significant. In the pr...Constructing an information storage or communication system, where countless pieces of information canbe hidden like a canvas and revealed on demand throughspecific stimuli or decoding rules, is significant. In the presentstudy, we developed a hydrogel canvas that leverages noncovalentinteractions to induce phase separation in the polymer matrix, creating various “paintings”, including custommessages, using different chemical inks. Our strategy focuseson designing small molecule inks, with varying affinities withthe hydrogel and specific responsiveness to stimuli, to achievemultiple changes such as color shifts, fluorescence emission,and dynamic optical image evolution. This skips the typicaldesign approaches, such as incorporating responsive fluorophoresinto polymers for color emission through grafting orcopolymerization, and thus avoids the complex processes involved in modifying and synthesizing functional polymers,along with the uncertainties in material properties that theseprocesses bring.展开更多
In order to enhance the security of a browser password manager, we propose an approach based on a hardware trusted platform module （TPM）. Our approach encrypts users＇ passwords with keys generated by the TPM, which...In order to enhance the security of a browser password manager, we propose an approach based on a hardware trusted platform module （TPM）. Our approach encrypts users＇ passwords with keys generated by the TPM, which uses a master password as the credential for authorization to access the TPM. Such a hardware-based feature may provide an efficient way to protect users＇ passwords. Experiment and evaluation results show that our approach performs well to defend against password stealing attack and brute force attack. Attackers cannot get passwords directly from the browser, therefore they will spend incredible time to obtain passwords. Besides, performance cost induced by our approach is acceptable.Abstract： In order to enhance the security of a browser password manager, we propose an approach based on a hardware trusted platform module （TPM）. Our approach encrypts users＇ passwords with keys generated by the TPM, which uses a master password as the credential for authorization to access the TPM. Such a hardware-based feature may provide an efficient way to protect users＇ passwords. Experiment and evaluation results show that our approach performs well to defend against password stealing attack and brute force attack. Attackers cannot get passwords directly from the browser, therefore they will spend incredible time to obtain passwords. Besides, performance cost induced by our approach is acceptable.展开更多
A quantum identification system based on the transformation of polarization of a mesoscopic coherent state is proposed. Physically, an initial polarization state which carries the identity information is transformed i...A quantum identification system based on the transformation of polarization of a mesoscopic coherent state is proposed. Physically, an initial polarization state which carries the identity information is transformed into an arbitrary elliptical polarization state, To verify the identity of a communicator, a reverse procedure is performed by the receiver, For simply describing the transformation procedure, the analytical methods of Poincaré sphere and quaternion are adopted. Since quantum noise provides such a measurement uncertainty for the eavesdropping that the identity information cannot be retrieved from the elliptical polarization state, the proposed scheme is secure.展开更多
Ubiquitous computing must incorporate a certain level of security.For the severely resource constrained applications,the energy-efficient and small size cryptography algorithm implementation is a critical problem.Hard...Ubiquitous computing must incorporate a certain level of security.For the severely resource constrained applications,the energy-efficient and small size cryptography algorithm implementation is a critical problem.Hardware implementations of the advanced encryption standard(AES)for authentication and encryption are presented.An energy consumption variable is derived to evaluate low-power design strategies for battery-powered devices.It proves that compact AES architectures fail to optimize the AES hardware energy,whereas reducing invalid switching activities and implementing power-optimized sub-modules are the reasonable methods.Implementations of different substitution box(S-Boxes)structures are presented with 0.25μm 1.8 V CMOS(complementary metal oxide semiconductor)standard cell library.The comparisons and trade-offs among area,security,and power are explored.The experimental results show that Galois field composite S-Boxes have smaller size and highest security but consume considerably more power,whereas decoder-switch-encoder S-Boxes have the best power characteristics with disadvantages in terms of size and security.The combination of these two type S-Boxes instead of homogeneous S-Boxes in AES circuit will lead to optimal schemes.The technique of latch-dividing data path is analyzed,and the quantitative simulation results demonstrate that this approach diminishes the glitches effectively at a very low hardware cost.展开更多
Elliptic Curve Cryptography recently gained a lot of attention in industry. The principal attraction of ECC compared to RSA is that it offers equal security for a smaller key size. The present paper includes the study...Elliptic Curve Cryptography recently gained a lot of attention in industry. The principal attraction of ECC compared to RSA is that it offers equal security for a smaller key size. The present paper includes the study of two elliptic curve and defined over the ring where . After showing isomorphism between and , we define a composition operation (in the form of a mapping) on their union set. Then we have discussed our proposed cryptographic schemes based on the elliptic curve . We also illustrate the coding of points over E, secret key exchange and encryption/decryption methods based on above said elliptic curve. Since our proposed schemes are based on elliptic curve of the particular type, therefore the proposed schemes provides a highest strength-per-bit of any cryptosystem known today with smaller key size resulting in faster computations, lower power assumption and memory. Another advantage is that authentication protocols based on ECC are secure enough even if a small key size is used.展开更多
Numerous cryptographic algorithms (ElGamal, Rabin, RSA, NTRU etc) require multiple computations of modulo multiplicative inverses. This paper describes and validates a new algorithm, called the Enhanced Euclid Algorit...Numerous cryptographic algorithms (ElGamal, Rabin, RSA, NTRU etc) require multiple computations of modulo multiplicative inverses. This paper describes and validates a new algorithm, called the Enhanced Euclid Algorithm, for modular multiplicative inverse (MMI). Analysis of the proposed algorithm shows that it is more efficient than the Extended Euclid algorithm (XEA). In addition, if a MMI does not exist, then it is not necessary to use the Backtracking procedure in the proposed algorithm;this case requires fewer operations on every step (divisions, multiplications, additions, assignments and push operations on stack), than the XEA. Overall, XEA uses more multiplications, additions, assignments and twice as many variables than the proposed algorithm.展开更多
With the rapid evolution of data exchange in network environments, information security has been the most important process for data storage and communication. In order to provide such information security, the confid...With the rapid evolution of data exchange in network environments, information security has been the most important process for data storage and communication. In order to provide such information security, the confidentiality, data integrity, and data origin authentication must be verified based on cryptographic encryption algorithms. This paper presents a new emerging trend of modern symmetric encryption algorithm by development of the advanced encryption standard (AES) algorithm. The new development focuses on the integration between Quantum Key Distribution (QKD) and an enhanced version of AES. A new quantum symmetric encryption algorithm, which is abbreviated as Quantum-AES (QAES), is the output of such integration. QAES depends on generation of dynamic quantum S-Boxes (DQS-Boxes) based quantum cipher key, instead of the ordinary used static S-Boxes. Furthermore, QAES exploits the specific selected secret key generated from the QKD cipher using two different modes (online and off-line).展开更多
E-administration is performing administrative works via computer and its associated technologies such as the Internet. It is administrative efforts that center on the exchange of information and providing services to ...E-administration is performing administrative works via computer and its associated technologies such as the Internet. It is administrative efforts that center on the exchange of information and providing services to people and the business sector at high speed and low cost through computers and networks with the assurance of maintaining information security. It is based on the positive investment in information technology and communication in administrative practices. This paper presents the design of the e-administration platform that adopts the concept of cryptography for identity management. The architectural framework of the platform comprises subcomponents for service and forms identification, business process redesign, service architecture, amalgamation, and deployment. The cryptography model for securing the platform was designed based on the combination of authentication criteria presented in the Rijndael-Advanced Encryption Standard (AES), Lattice-based cryptography (LBC), and Secure Hash Algorithm (SHA512). It is required that a record be encrypted prior to its commitment to the database via a double encryption method. The AES algorithm-based encryption’s output will form the input to the LBC algorithm to obtain the final output.展开更多
In many applications, it is necessary to transmit images at a remote station, where wired Internet service is not available. In this case, wireless local loop (WLL) can help in making wireless link between one end nod...In many applications, it is necessary to transmit images at a remote station, where wired Internet service is not available. In this case, wireless local loop (WLL) can help in making wireless link between one end node of the internet and remote service center. In such link, the communication is heavily affected by large and small scale fading;hence the received signal experiences huge distortion in case of forward error correction. Otherwise, huge service delay arises due to frequent negative acknowledgements. To combat the situation, we can choose Alamouti channel of full rate and fully orthogonal space-time block code (OSTBC). Our aim is to transmit images through Alamouti channel and to observe the quality of the recovered image, in context of bit error rate (BER). We have also observed the impact of fading and additive white Gaussian noise (AWGN) on the image without application of error correction or detection technique of channel coding. To ensure security, we apply the RSA algorithm on each pixel prior transmitting and decrypt them at the receiving end, where we found no impairment from the algorithm. Finally, we observe that the relative performance of the system changes digital modulation schemes.展开更多
Data outsourcing through cloud storage enables the users to share on-demand resources with cost effective IT services but several security issues arise like confidentiality, integrity and authentication. Each of them ...Data outsourcing through cloud storage enables the users to share on-demand resources with cost effective IT services but several security issues arise like confidentiality, integrity and authentication. Each of them plays an important role in the successful achievement of the other. In cloud computing data integrity assurance is one of the major challenges because the user has no control over the security mechanism to protect the data. Data integrity insures that data received are the same as data stored. It is a result of data security but data integrity refers to validity and accuracy of data rather than protect the data. Data security refers to protection of data against unauthorized access, modification or corruption and it is necessary to ensure data integrity. This paper proposed a new approach using Matrix Dialing Method in block level to enhance the performance of both data integrity and data security without using Third Party Auditor (TPA). In this approach, the data are partitioned into number of blocks and each block converted into a square matrix. Determinant factor of each matrix is generated dynamically to ensure data integrity. This model also implements a combination of AES algorithm and SHA-1 algorithm for digital signature generation. Data coloring on digital signature is applied to ensure data security with better performance. The performance analysis using cloud simulator shows that the proposed scheme is highly efficient and secure as it overcomes the limitations of previous approaches of data security using encryption and decryption algorithms and data integrity assurance using TPA due to server computation time and accuracy.展开更多
This paper deals with the implementation of algorithms and tools for the security of academic data protection in the Democratic Republic of the Congo. It consists principally in implementing two algorithms and two dis...This paper deals with the implementation of algorithms and tools for the security of academic data protection in the Democratic Republic of the Congo. It consists principally in implementing two algorithms and two distinct tools to secure data and in this particular case, academic data of higher and university education in the Democratic Republic of the Congo. The design of algorithms meets the approach that any researcher in data encryption must use during the development of a computer system. Briefly, these algorithms are steps to follow to encrypt information in any programming language. These algorithms are based on symmetric and asymmetric encryption, the first one uses Christopher Hill’s algorithm, which uses texts in the form of matrices before they are encrypted and RSA as one of the asymmetric algorithms, it uses the prime numbers that we have encoded on more than 512 bits. As for tools, we have developed them in php which is only a programming language taken as an example because it is impossible to use all of them. The tools implemented are based on the algorithms of Caesar, Christopher Hill, and RSA showing how the encryption operations are carried out thanks to graphical interfaces. They are only tools for pedagogical reasons to help students and other researchers learn how to use developed algorithms. We have not developed them for pleasure but rather to be used in any information system, which would prevent and limit unauthorized access to computer systems. They will not be used only for the management of academic fees but for any other information system, which explains and shows the complexity of the tools developed. We have not been able to solve the problems of versions for the developed prototype, because if there is a new version later some functions may be obsolete, which would constitute the limitation of these tools. This work targets primarily the Ministry of Higher Education and Universities, which will make these results its own and implement them in order to solve the problem of intrusions, and unauthorized access to developers and researchers who will use tools already made instead of thinking about their development. We are trying to demonstrate the steps and the methodology that allowed us to reach our results, in the following lines.展开更多
For complex-valued or quaternionic neural networks,scholars and researchers usually decompose them into real-valued systems.The decomposed real-valued systems are equiv-alent to original systems.Then,the dynamical beh...For complex-valued or quaternionic neural networks,scholars and researchers usually decompose them into real-valued systems.The decomposed real-valued systems are equiv-alent to original systems.Then,the dynamical behaviors of real-valued systems obtained are investigated,including stability,synchronization,and chaos etc.In this paper,a class of quaternionic neural networks with time-varying delays is investigated.First,by designing a suitable PI controller,synchronization of the considered chaotic system is realized.By using a non-decomposition method and structuring a novel Lyapunov functional,sufficient conditions are derived to guarantee synchronization between the drive-response systems.It is worth mentioning that,unlike other methods,our approach does not require break-ing down the quaternionic neural networks into four separate real-valued systems.Fur-thermore,we demonstrate the practical application of these chaotic quaternionic neural networks with time-varying delays in image encryption and decryption.Based on one se-quence of chaotic signal from state trajectory of single quaternion-valued neuron and a new encryption algorithm,the application of chaotic system proposed,that is,image encryp-tion,is researched.The process of image decryption is simply the reverse of the encryption process.Finally,numerical simulation examples are provided to validate the effectiveness of the designed PI controller and performance of image encryption and decryption.展开更多
Hardware based neuromorphic sensory system has attracted great attention for cognitive interactive platform.Auditory perception system can capture and analyze various sound signals,helping us to detect dangerous surro...Hardware based neuromorphic sensory system has attracted great attention for cognitive interactive platform.Auditory perception system can capture and analyze various sound signals,helping us to detect dangerous surroundings and judge environmental conditions.Therefore,developing neuromorphic auditory system that can decode auditory spatiotemporal information would be interesting.Here,an artificial auditory perceptual system is proposed by integrating sound frequency sensitive triboelectric nanogenerators(SFS-TENGs)and oxide based ionotronic neuromorphic transistor.With perforated configuration,the SFS-TENG adopting polyetheretherketone membrane and polytetrafluoroethylene membrane as friction layers can convert sound wave signals into electrical signals,exhibiting a high sensitivity of~2.24 V/dB and good durability.The neuromorphic transistor can further process electrical signals generated by SFS-TENG.Thus,the system can mimic auditory perception,exhibiting a wide range of sound pressure and frequency recognition capabilities.Information encryption/decryption and Doppler frequency shift temporal information processing are demonstrated on the TENG based auditory system for the first time.The present auditory perceptual system demonstrates broad application prospects,providing new opportunities to create sophisticated,adaptable,and interactive systems.展开更多
With the rapid development of information technology,data has become the cornerstone of digitalization,networking,and intelligence,profoundly impacting various sectors including production,distribution,circulation,con...With the rapid development of information technology,data has become the cornerstone of digitalization,networking,and intelligence,profoundly impacting various sectors including production,distribution,circulation,consumption,and social service management.As the core resource of the digital economy and information society,the economic and social value of big data is increasingly prominent,yet it has also become a prime target for cyberattacks.In the face of a complex and ever-changing data environment and advanced cyber threats,traditional big data security technologies such as Hadoop and other mainstream technologies are proving inadequate in ensuring data security and compliance.Consequently,cryptography-based technologies such as fully encrypted execution environments and efficient data encryption and decryption have emerged as new directions for security protection in the field of big data.This paper delves into the latest advancements and challenges in this area by exploring the current state of big data security,the principles of endogenous security technologies,practical applications,and future prospects.展开更多
基金supported by the National Natural Science Foundation of China(12471416,12171124,12301567)the Heilongjiang Provincial Natural Science Foundation of China(PL2024F015)+2 种基金the Postdoctoral Science Foundation of Heilongjiang Province of China(LBH-Z22199)the Fundamental Research Foun-dation for Universities of Heilongjiang Province of China(2022-KYYWF-0141)the Alexander von Humboldt Foundation of Germany.
文摘Dear Editor,This letter deals with the distributed recursive set-membership filtering(DRSMF)issue for state-saturated systems under encryption-decryption mechanism.To guarantee the data security,the encryption-decryption mechanism is considered in the signal transmission process.Specifically,a novel DRSMF scheme is developed such that,for both state saturation and encryption-decryption mechanism,the filtering error(FE)is limited to the ellipsoid domain.Then,the filtering error constraint matrix(FECM)is computed and a desirable filter gain is derived by minimizing the FECM.Besides,the bound-edness evaluation of the FECM is provided.
文摘This paper analyzes the problems in image encryption and decryption based on chaos theory. This article introduces the application of the two-stage Logistic algorithm in image encryption and decryption, then by information entropy analysis it is concluded that the security of this algorithm is higher compared with the original image;And a new image encryption and decryption algorithm based on the combination of two-stage Logistic mapping and <i>M</i> sequence is proposed. This new algorithm is very sensitive to keys;the key space is large and its security is higher than two-stage Logistic mapping of image encryption and decryption technology.
基金funded by Princess Nourah bint Abdulrahman UniversityResearchers Supporting Project number (PNURSP2024R408), Princess Nourah bint AbdulrahmanUniversity, Riyadh, Saudi Arabia.
文摘A basic procedure for transforming readable data into encoded forms is encryption, which ensures security when the right decryption keys are used. Hadoop is susceptible to possible cyber-attacks because it lacks built-in security measures, even though it can effectively handle and store enormous datasets using the Hadoop Distributed File System (HDFS). The increasing number of data breaches emphasizes how urgently creative encryption techniques are needed in cloud-based big data settings. This paper presents Adaptive Attribute-Based Honey Encryption (AABHE), a state-of-the-art technique that combines honey encryption with Ciphertext-Policy Attribute-Based Encryption (CP-ABE) to provide improved data security. Even if intercepted, AABHE makes sure that sensitive data cannot be accessed by unauthorized parties. With a focus on protecting huge files in HDFS, the suggested approach achieves 98% security robustness and 95% encryption efficiency, outperforming other encryption methods including Ciphertext-Policy Attribute-Based Encryption (CP-ABE), Key-Policy Attribute-Based Encryption (KB-ABE), and Advanced Encryption Standard combined with Attribute-Based Encryption (AES+ABE). By fixing Hadoop’s security flaws, AABHE fortifies its protections against data breaches and enhances Hadoop’s dependability as a platform for processing and storing massive amounts of data.
文摘A new encryption/decryption system for optical information security is proposed in this paper. We used an iterative Fourier transform algorithm to optimize the encrypted hologram as well as the decryption key as phase-only elements. The optical decryption was implemented by superimposing the encrypted hologram and the decryyption key in a simple optical setup. Numerical simulation and optical experiment have confirmed the proposed technique as a simple and easy implementation for optical decryption, demonstrating potential applications in optical information security verification.
文摘Any linear transform matrix can be used to easily calculate a consistent form, and a plurality of conversion can be easily connected together by matrix multiplication. When performing file transfers, you can encrypt files matrix transformation. Article presents a matrix-based electronic document encryption and decryption algorithm, which relies on a special class of matrices combinatorial problems, the method to improve the security of electronic document system is feasible and effective, and finally give the source code and programming software.
基金financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC)le Fonds de recherche du Quebec: Nature et technologies (FRQNT)+1 种基金The Centre Québécois sur les Matériaux Fonctionnels (CQMF)FRQNT and the China Scholarship Council (CSC) for awarding scholarships。
文摘Constructing an information storage or communication system, where countless pieces of information canbe hidden like a canvas and revealed on demand throughspecific stimuli or decoding rules, is significant. In the presentstudy, we developed a hydrogel canvas that leverages noncovalentinteractions to induce phase separation in the polymer matrix, creating various “paintings”, including custommessages, using different chemical inks. Our strategy focuseson designing small molecule inks, with varying affinities withthe hydrogel and specific responsiveness to stimuli, to achievemultiple changes such as color shifts, fluorescence emission,and dynamic optical image evolution. This skips the typicaldesign approaches, such as incorporating responsive fluorophoresinto polymers for color emission through grafting orcopolymerization, and thus avoids the complex processes involved in modifying and synthesizing functional polymers,along with the uncertainties in material properties that theseprocesses bring.
基金Supported by the National Natural Science Foundation of China(61472429,61070192,91018008,61303074,61170240)the Beijing Municipal Natural Science Foundation(4122041)National High-Technology Research and Development Program of China(863 Program)(2007AA01Z414)
文摘In order to enhance the security of a browser password manager, we propose an approach based on a hardware trusted platform module （TPM）. Our approach encrypts users＇ passwords with keys generated by the TPM, which uses a master password as the credential for authorization to access the TPM. Such a hardware-based feature may provide an efficient way to protect users＇ passwords. Experiment and evaluation results show that our approach performs well to defend against password stealing attack and brute force attack. Attackers cannot get passwords directly from the browser, therefore they will spend incredible time to obtain passwords. Besides, performance cost induced by our approach is acceptable.Abstract： In order to enhance the security of a browser password manager, we propose an approach based on a hardware trusted platform module （TPM）. Our approach encrypts users＇ passwords with keys generated by the TPM, which uses a master password as the credential for authorization to access the TPM. Such a hardware-based feature may provide an efficient way to protect users＇ passwords. Experiment and evaluation results show that our approach performs well to defend against password stealing attack and brute force attack. Attackers cannot get passwords directly from the browser, therefore they will spend incredible time to obtain passwords. Besides, performance cost induced by our approach is acceptable.
基金Project supported by the National Natural Science Foundation of China （Grant No 60472018）.
文摘A quantum identification system based on the transformation of polarization of a mesoscopic coherent state is proposed. Physically, an initial polarization state which carries the identity information is transformed into an arbitrary elliptical polarization state, To verify the identity of a communicator, a reverse procedure is performed by the receiver, For simply describing the transformation procedure, the analytical methods of Poincaré sphere and quaternion are adopted. Since quantum noise provides such a measurement uncertainty for the eavesdropping that the identity information cannot be retrieved from the elliptical polarization state, the proposed scheme is secure.
基金the"863"High Technology Research and Development Program of China(2006AA01Z226)the Scientific Research Foundation of Huazhong University of Science and Technology(2006Z011B)the Program for New Century Excellent Talents in University(NCET-07-0328).
文摘Ubiquitous computing must incorporate a certain level of security.For the severely resource constrained applications,the energy-efficient and small size cryptography algorithm implementation is a critical problem.Hardware implementations of the advanced encryption standard(AES)for authentication and encryption are presented.An energy consumption variable is derived to evaluate low-power design strategies for battery-powered devices.It proves that compact AES architectures fail to optimize the AES hardware energy,whereas reducing invalid switching activities and implementing power-optimized sub-modules are the reasonable methods.Implementations of different substitution box(S-Boxes)structures are presented with 0.25μm 1.8 V CMOS(complementary metal oxide semiconductor)standard cell library.The comparisons and trade-offs among area,security,and power are explored.The experimental results show that Galois field composite S-Boxes have smaller size and highest security but consume considerably more power,whereas decoder-switch-encoder S-Boxes have the best power characteristics with disadvantages in terms of size and security.The combination of these two type S-Boxes instead of homogeneous S-Boxes in AES circuit will lead to optimal schemes.The technique of latch-dividing data path is analyzed,and the quantitative simulation results demonstrate that this approach diminishes the glitches effectively at a very low hardware cost.
文摘Elliptic Curve Cryptography recently gained a lot of attention in industry. The principal attraction of ECC compared to RSA is that it offers equal security for a smaller key size. The present paper includes the study of two elliptic curve and defined over the ring where . After showing isomorphism between and , we define a composition operation (in the form of a mapping) on their union set. Then we have discussed our proposed cryptographic schemes based on the elliptic curve . We also illustrate the coding of points over E, secret key exchange and encryption/decryption methods based on above said elliptic curve. Since our proposed schemes are based on elliptic curve of the particular type, therefore the proposed schemes provides a highest strength-per-bit of any cryptosystem known today with smaller key size resulting in faster computations, lower power assumption and memory. Another advantage is that authentication protocols based on ECC are secure enough even if a small key size is used.
文摘Numerous cryptographic algorithms (ElGamal, Rabin, RSA, NTRU etc) require multiple computations of modulo multiplicative inverses. This paper describes and validates a new algorithm, called the Enhanced Euclid Algorithm, for modular multiplicative inverse (MMI). Analysis of the proposed algorithm shows that it is more efficient than the Extended Euclid algorithm (XEA). In addition, if a MMI does not exist, then it is not necessary to use the Backtracking procedure in the proposed algorithm;this case requires fewer operations on every step (divisions, multiplications, additions, assignments and push operations on stack), than the XEA. Overall, XEA uses more multiplications, additions, assignments and twice as many variables than the proposed algorithm.
文摘With the rapid evolution of data exchange in network environments, information security has been the most important process for data storage and communication. In order to provide such information security, the confidentiality, data integrity, and data origin authentication must be verified based on cryptographic encryption algorithms. This paper presents a new emerging trend of modern symmetric encryption algorithm by development of the advanced encryption standard (AES) algorithm. The new development focuses on the integration between Quantum Key Distribution (QKD) and an enhanced version of AES. A new quantum symmetric encryption algorithm, which is abbreviated as Quantum-AES (QAES), is the output of such integration. QAES depends on generation of dynamic quantum S-Boxes (DQS-Boxes) based quantum cipher key, instead of the ordinary used static S-Boxes. Furthermore, QAES exploits the specific selected secret key generated from the QKD cipher using two different modes (online and off-line).
文摘E-administration is performing administrative works via computer and its associated technologies such as the Internet. It is administrative efforts that center on the exchange of information and providing services to people and the business sector at high speed and low cost through computers and networks with the assurance of maintaining information security. It is based on the positive investment in information technology and communication in administrative practices. This paper presents the design of the e-administration platform that adopts the concept of cryptography for identity management. The architectural framework of the platform comprises subcomponents for service and forms identification, business process redesign, service architecture, amalgamation, and deployment. The cryptography model for securing the platform was designed based on the combination of authentication criteria presented in the Rijndael-Advanced Encryption Standard (AES), Lattice-based cryptography (LBC), and Secure Hash Algorithm (SHA512). It is required that a record be encrypted prior to its commitment to the database via a double encryption method. The AES algorithm-based encryption’s output will form the input to the LBC algorithm to obtain the final output.
文摘In many applications, it is necessary to transmit images at a remote station, where wired Internet service is not available. In this case, wireless local loop (WLL) can help in making wireless link between one end node of the internet and remote service center. In such link, the communication is heavily affected by large and small scale fading;hence the received signal experiences huge distortion in case of forward error correction. Otherwise, huge service delay arises due to frequent negative acknowledgements. To combat the situation, we can choose Alamouti channel of full rate and fully orthogonal space-time block code (OSTBC). Our aim is to transmit images through Alamouti channel and to observe the quality of the recovered image, in context of bit error rate (BER). We have also observed the impact of fading and additive white Gaussian noise (AWGN) on the image without application of error correction or detection technique of channel coding. To ensure security, we apply the RSA algorithm on each pixel prior transmitting and decrypt them at the receiving end, where we found no impairment from the algorithm. Finally, we observe that the relative performance of the system changes digital modulation schemes.
文摘Data outsourcing through cloud storage enables the users to share on-demand resources with cost effective IT services but several security issues arise like confidentiality, integrity and authentication. Each of them plays an important role in the successful achievement of the other. In cloud computing data integrity assurance is one of the major challenges because the user has no control over the security mechanism to protect the data. Data integrity insures that data received are the same as data stored. It is a result of data security but data integrity refers to validity and accuracy of data rather than protect the data. Data security refers to protection of data against unauthorized access, modification or corruption and it is necessary to ensure data integrity. This paper proposed a new approach using Matrix Dialing Method in block level to enhance the performance of both data integrity and data security without using Third Party Auditor (TPA). In this approach, the data are partitioned into number of blocks and each block converted into a square matrix. Determinant factor of each matrix is generated dynamically to ensure data integrity. This model also implements a combination of AES algorithm and SHA-1 algorithm for digital signature generation. Data coloring on digital signature is applied to ensure data security with better performance. The performance analysis using cloud simulator shows that the proposed scheme is highly efficient and secure as it overcomes the limitations of previous approaches of data security using encryption and decryption algorithms and data integrity assurance using TPA due to server computation time and accuracy.
文摘This paper deals with the implementation of algorithms and tools for the security of academic data protection in the Democratic Republic of the Congo. It consists principally in implementing two algorithms and two distinct tools to secure data and in this particular case, academic data of higher and university education in the Democratic Republic of the Congo. The design of algorithms meets the approach that any researcher in data encryption must use during the development of a computer system. Briefly, these algorithms are steps to follow to encrypt information in any programming language. These algorithms are based on symmetric and asymmetric encryption, the first one uses Christopher Hill’s algorithm, which uses texts in the form of matrices before they are encrypted and RSA as one of the asymmetric algorithms, it uses the prime numbers that we have encoded on more than 512 bits. As for tools, we have developed them in php which is only a programming language taken as an example because it is impossible to use all of them. The tools implemented are based on the algorithms of Caesar, Christopher Hill, and RSA showing how the encryption operations are carried out thanks to graphical interfaces. They are only tools for pedagogical reasons to help students and other researchers learn how to use developed algorithms. We have not developed them for pleasure but rather to be used in any information system, which would prevent and limit unauthorized access to computer systems. They will not be used only for the management of academic fees but for any other information system, which explains and shows the complexity of the tools developed. We have not been able to solve the problems of versions for the developed prototype, because if there is a new version later some functions may be obsolete, which would constitute the limitation of these tools. This work targets primarily the Ministry of Higher Education and Universities, which will make these results its own and implement them in order to solve the problem of intrusions, and unauthorized access to developers and researchers who will use tools already made instead of thinking about their development. We are trying to demonstrate the steps and the methodology that allowed us to reach our results, in the following lines.
基金funded by the Scientific Research Program Funded by the Shaanxi Provincial Education Department(Grant No.23JK0550)by the Natural Science Basic Research Program of Shaanxi Province(Grant Nos.2024JC-YBQN-0726,2024JCYBMS-352 and 2023-JC-QN-0001)+2 种基金by the Qin Chuangyuan"Scientists+Engineers"Team Construction in Shaanxi Province(Grant No.2022KXJ-38)by the Xi'an Science and Technology Program(Grant No.2022JH-RGZN-0041)by the Xi'an Science and Technology Program(Grant No.23ZDCYJSGG0025-2022).
文摘For complex-valued or quaternionic neural networks,scholars and researchers usually decompose them into real-valued systems.The decomposed real-valued systems are equiv-alent to original systems.Then,the dynamical behaviors of real-valued systems obtained are investigated,including stability,synchronization,and chaos etc.In this paper,a class of quaternionic neural networks with time-varying delays is investigated.First,by designing a suitable PI controller,synchronization of the considered chaotic system is realized.By using a non-decomposition method and structuring a novel Lyapunov functional,sufficient conditions are derived to guarantee synchronization between the drive-response systems.It is worth mentioning that,unlike other methods,our approach does not require break-ing down the quaternionic neural networks into four separate real-valued systems.Fur-thermore,we demonstrate the practical application of these chaotic quaternionic neural networks with time-varying delays in image encryption and decryption.Based on one se-quence of chaotic signal from state trajectory of single quaternion-valued neuron and a new encryption algorithm,the application of chaotic system proposed,that is,image encryp-tion,is researched.The process of image decryption is simply the reverse of the encryption process.Finally,numerical simulation examples are provided to validate the effectiveness of the designed PI controller and performance of image encryption and decryption.
基金granted by the National Natural Science Foundation of China(No.U22A2075)Ningbo Key Scientific and Technological Project(No.2021Z116).
文摘Hardware based neuromorphic sensory system has attracted great attention for cognitive interactive platform.Auditory perception system can capture and analyze various sound signals,helping us to detect dangerous surroundings and judge environmental conditions.Therefore,developing neuromorphic auditory system that can decode auditory spatiotemporal information would be interesting.Here,an artificial auditory perceptual system is proposed by integrating sound frequency sensitive triboelectric nanogenerators(SFS-TENGs)and oxide based ionotronic neuromorphic transistor.With perforated configuration,the SFS-TENG adopting polyetheretherketone membrane and polytetrafluoroethylene membrane as friction layers can convert sound wave signals into electrical signals,exhibiting a high sensitivity of~2.24 V/dB and good durability.The neuromorphic transistor can further process electrical signals generated by SFS-TENG.Thus,the system can mimic auditory perception,exhibiting a wide range of sound pressure and frequency recognition capabilities.Information encryption/decryption and Doppler frequency shift temporal information processing are demonstrated on the TENG based auditory system for the first time.The present auditory perceptual system demonstrates broad application prospects,providing new opportunities to create sophisticated,adaptable,and interactive systems.
文摘With the rapid development of information technology,data has become the cornerstone of digitalization,networking,and intelligence,profoundly impacting various sectors including production,distribution,circulation,consumption,and social service management.As the core resource of the digital economy and information society,the economic and social value of big data is increasingly prominent,yet it has also become a prime target for cyberattacks.In the face of a complex and ever-changing data environment and advanced cyber threats,traditional big data security technologies such as Hadoop and other mainstream technologies are proving inadequate in ensuring data security and compliance.Consequently,cryptography-based technologies such as fully encrypted execution environments and efficient data encryption and decryption have emerged as new directions for security protection in the field of big data.This paper delves into the latest advancements and challenges in this area by exploring the current state of big data security,the principles of endogenous security technologies,practical applications,and future prospects.
