Protection of private key is the most critical part in public key infrastructure(PKI) system since it depends on the confidentiality of private key. Thread of password detection has been known as the vulnerability in ...Protection of private key is the most critical part in public key infrastructure(PKI) system since it depends on the confidentiality of private key. Thread of password detection has been known as the vulnerability in this PKI system. Recently, studies have been conducted on Bio PKI system that uses the biometric information of users in order to replace the password type of private key protection in PKI system. However, Bio PKI system also has vulnerability in that biometric information used for protection of private key cannot be reused once it is stolen or lost. So, we propose the method to protect the private key using FIDSEQi which binds sequence to biometric information. The proposed method enhances reusability of biometric information and presents higher attack complexity than the method of authentication by cross matching single biometric information.展开更多
Human fingers have fingerprints and mechanoreceptors for biometric information encryption and tactile perception.Ideally,electronic skin(e-skin)integrates identity information and tactile sensing,but this remains chal...Human fingers have fingerprints and mechanoreceptors for biometric information encryption and tactile perception.Ideally,electronic skin(e-skin)integrates identity information and tactile sensing,but this remains challenging.Research on encryption and tactile sensing rarely overlaps.Here,we report using magnetization structures and combinations of magnetic materials to achieve two types of functions:6n×n invisible secure encryption is achieved through a n×n dipole magnetic array,and multipole magnets are used to achieve decoupling of pressure at various positions and sliding in different directions.The sliding distance ranges from 0 to 2.5 mm,with speeds between 5 and 25 mm/s.This study is based on flexible magnetic films,which have the potential to be used in wearable devices.The magnetic ring and signal detection modules verify the prospects of this fundamental principle in human-computer interaction(HCI)and demonstrate its applications in user identity recognition and tactile interaction.展开更多
In pervasive computing environments,users can get services anytime and anywhere,but the ubiquity and mobility of the environments bring new security challenges.The user and the service provider do not know each other ...In pervasive computing environments,users can get services anytime and anywhere,but the ubiquity and mobility of the environments bring new security challenges.The user and the service provider do not know each other in advance,they should mutually authenticate each other.The service provider prefers to authenticate the user based on his identity while the user tends to stay anonymous.Privacy and security are two important but seemingly contradictory objectives.As a result,a user prefers not to expose any sensitive information to the service provider such as his physical location,ID and so on when being authenticated.In this paper,a highly flexible mutual authentication and key establishment protocol scheme based on biometric encryption and Diffie-Hellman key exchange to secure interactions between a user and a service provider is proposed.Not only can a user's anonymous authentication be achieved,but also the public key cryptography operations can be reduced by adopting this scheme.Different access control policies for different services are enabled by using biometric encryption technique.The correctness of the proposed authentication and key establishment protocol is formally verified based on SVO logic.展开更多
基金supported by the Sharing and Diffusion of National R&D Outcome funded by the Korea Institute of Science and Technology Information
文摘Protection of private key is the most critical part in public key infrastructure(PKI) system since it depends on the confidentiality of private key. Thread of password detection has been known as the vulnerability in this PKI system. Recently, studies have been conducted on Bio PKI system that uses the biometric information of users in order to replace the password type of private key protection in PKI system. However, Bio PKI system also has vulnerability in that biometric information used for protection of private key cannot be reused once it is stolen or lost. So, we propose the method to protect the private key using FIDSEQi which binds sequence to biometric information. The proposed method enhances reusability of biometric information and presents higher attack complexity than the method of authentication by cross matching single biometric information.
基金supported by the National Natural Science Foundation of China(No.52105072,62304023)the National Key Research and DevelopmentProgram ofChina(No.2022YFC3802302,2023YFB3507300).
文摘Human fingers have fingerprints and mechanoreceptors for biometric information encryption and tactile perception.Ideally,electronic skin(e-skin)integrates identity information and tactile sensing,but this remains challenging.Research on encryption and tactile sensing rarely overlaps.Here,we report using magnetization structures and combinations of magnetic materials to achieve two types of functions:6n×n invisible secure encryption is achieved through a n×n dipole magnetic array,and multipole magnets are used to achieve decoupling of pressure at various positions and sliding in different directions.The sliding distance ranges from 0 to 2.5 mm,with speeds between 5 and 25 mm/s.This study is based on flexible magnetic films,which have the potential to be used in wearable devices.The magnetic ring and signal detection modules verify the prospects of this fundamental principle in human-computer interaction(HCI)and demonstrate its applications in user identity recognition and tactile interaction.
基金Supported by the National Natural Science Foundation of China (No.60703101)
文摘In pervasive computing environments,users can get services anytime and anywhere,but the ubiquity and mobility of the environments bring new security challenges.The user and the service provider do not know each other in advance,they should mutually authenticate each other.The service provider prefers to authenticate the user based on his identity while the user tends to stay anonymous.Privacy and security are two important but seemingly contradictory objectives.As a result,a user prefers not to expose any sensitive information to the service provider such as his physical location,ID and so on when being authenticated.In this paper,a highly flexible mutual authentication and key establishment protocol scheme based on biometric encryption and Diffie-Hellman key exchange to secure interactions between a user and a service provider is proposed.Not only can a user's anonymous authentication be achieved,but also the public key cryptography operations can be reduced by adopting this scheme.Different access control policies for different services are enabled by using biometric encryption technique.The correctness of the proposed authentication and key establishment protocol is formally verified based on SVO logic.
