The universal composability framework is a new approach for designing and analyzing the security of cryptographic protocols.In this framework,the security of protocols is maintained under a general protocol compositio...The universal composability framework is a new approach for designing and analyzing the security of cryptographic protocols.In this framework,the security of protocols is maintained under a general protocol composition operation.In the paper,we propose the universal composability framework for the analysis of proxy threshold signature and present a universally composable secure proxy threshold signature scheme which is the first one in this area.The proposed scheme is suitable for the mobile agents,which should migrate across different environment through network.Furthermore,we give the concrete analysis of the reduction to prove the security of the proposed scheme.展开更多
This paper proposes an efficient batch secret sharing protocol among n players resilient to t 〈 n/4 players in asynchronous network. The construction of our protocol is along the line of Hirt＇s protocol which works ...This paper proposes an efficient batch secret sharing protocol among n players resilient to t 〈 n/4 players in asynchronous network. The construction of our protocol is along the line of Hirt＇s protocol which works in synchronous model. Compared with the method of using secret share protocol m times to share m secrets, our protocol is quite efficient. The protocol can be used to improve the efficiency of secure multi-party computation （MPC） greatly in asynchronous network.展开更多
Wearable biosensors provide continuous,real-time physiological monitoring of biochemical markers in biofluids such as sweat,tears,saliva,and interstitial fluid.However,achieving high stretchability and stable biochemi...Wearable biosensors provide continuous,real-time physiological monitoring of biochemical markers in biofluids such as sweat,tears,saliva,and interstitial fluid.However,achieving high stretchability and stable biochemical signal monitoring remains challenging.Here,we propose a hybrid microstructure(HMS)strategy to fabricate highly stretchable multifunctional biosensors capable of detecting sweat electrolyte concentrations,pH levels,and surface electromyography(EMG)signals.By integrating a HMS,stable conductivity under large strains is ensured.Stretching tests up to 5000 cycles demonstrated the electrodes’stretchable stability and reliability.The high-performance electrodes were used for EMG monitoring on human skin.Additionally,active materials were coated onto the stretchable electrodes to create multifunctional sweat sensors capable of monitoring pH as well as calcium,sodium,and potassium ions(Ca^(2+),Na^(+),K^(+)).The electrodes reliably maintained their functionality under 60%strain,providing new insights into the fabrication of stable,highly stretchable biosensors.展开更多
基金the National Natural Science Foundation of China(Nos.60703031,60703004)the National High Technology Research and Development Program(863)of China(No.2006AA01Z4220the National Basic Research Program(973)of China(No.2007CB311201)
文摘The universal composability framework is a new approach for designing and analyzing the security of cryptographic protocols.In this framework,the security of protocols is maintained under a general protocol composition operation.In the paper,we propose the universal composability framework for the analysis of proxy threshold signature and present a universally composable secure proxy threshold signature scheme which is the first one in this area.The proposed scheme is suitable for the mobile agents,which should migrate across different environment through network.Furthermore,we give the concrete analysis of the reduction to prove the security of the proposed scheme.
基金the National Natural Science Foundation of China(No.60803146)
文摘This paper proposes an efficient batch secret sharing protocol among n players resilient to t 〈 n/4 players in asynchronous network. The construction of our protocol is along the line of Hirt＇s protocol which works in synchronous model. Compared with the method of using secret share protocol m times to share m secrets, our protocol is quite efficient. The protocol can be used to improve the efficiency of secure multi-party computation （MPC） greatly in asynchronous network.
基金supported by National Key R&D Program of China(2023YFC2414500,2023YFC2414502)National Natural Science Foun-dation of China(62201558,62101544,62101545,62201559 and 12074402)+5 种基金Shenzhen Science and Technology Innovation Program(KQTD20210811090217009)Shenzhen Science and Technology Pro-gram(KJZD20230923114108015)Natural Science Foundation of Guangdong Province(2023B1515040008)Guangdong Basic and Applied Basic Research Foundation(2023B1515120090)Shenzhen Major Science and Technology Projects(KJZD20230923114710022)Key Laboratory for Magnetic Resonance and Multimodality Imaging of Guangdong Province(2023B1212060052).
文摘Wearable biosensors provide continuous,real-time physiological monitoring of biochemical markers in biofluids such as sweat,tears,saliva,and interstitial fluid.However,achieving high stretchability and stable biochemical signal monitoring remains challenging.Here,we propose a hybrid microstructure(HMS)strategy to fabricate highly stretchable multifunctional biosensors capable of detecting sweat electrolyte concentrations,pH levels,and surface electromyography(EMG)signals.By integrating a HMS,stable conductivity under large strains is ensured.Stretching tests up to 5000 cycles demonstrated the electrodes’stretchable stability and reliability.The high-performance electrodes were used for EMG monitoring on human skin.Additionally,active materials were coated onto the stretchable electrodes to create multifunctional sweat sensors capable of monitoring pH as well as calcium,sodium,and potassium ions(Ca^(2+),Na^(+),K^(+)).The electrodes reliably maintained their functionality under 60%strain,providing new insights into the fabrication of stable,highly stretchable biosensors.
