Current grid authentication frameworks are achieved by applying the standard SSL authentication protocol （SAP）. The authentication process is very complicated, and therefore, the grid user is in a heavily loaded poi...Current grid authentication frameworks are achieved by applying the standard SSL authentication protocol （SAP）. The authentication process is very complicated, and therefore, the grid user is in a heavily loaded point both in computation and in communication. Based on identity-based architecture for grid （IBAG） and corresponding encryption and signature schemes, an identity-based authentication protocol for grid is proposed. Being certificate-free, the authentication protocol aligns well with the demands of grid computing. Through simulation testing, it is seen that the authentication protocol is more lightweight and efficient than SAP, especially the more lightweight user side. This contributes to the larger grid scalability.展开更多
针对现有大多数协议无法实现服务器、电子标签及读写器三方之间相互认证的缺陷,提出一种基于R-LWE(Learning with Errors over Ring)密码体制下可实现三方认证的协议。协议采用理想格对重要隐私信息进行加密,且加密同时混入不同随机数,...针对现有大多数协议无法实现服务器、电子标签及读写器三方之间相互认证的缺陷,提出一种基于R-LWE(Learning with Errors over Ring)密码体制下可实现三方认证的协议。协议采用理想格对重要隐私信息进行加密,且加密同时混入不同随机数,既可保障隐私信息安全,亦可使得消息具备新鲜性和不确定性。对所设计协议进行安全性分析、基于GNY逻辑形式化证明、性能分析,结果表明该协议具备良好的安全要求、严谨的推理、性能优于其他对比协议。展开更多
An enhaned NTRU cryptosystem eliminating decryption failures is proposed without using padding schemes and can resist the oracle model andchosen-ciphertext attacks. Because lattice reduction is the main threat to latt...An enhaned NTRU cryptosystem eliminating decryption failures is proposed without using padding schemes and can resist the oracle model andchosen-ciphertext attacks. Because lattice reduction is the main threat to lattice-based cryptosystems, lattice reductionalgorithms are analyzed to evaluate the security of this scheme. Furthermore, the new scheme remains the advantage of high efficiency of original NTRU.展开更多
In chaotic cryptosysterns, using （very） high dimensional chaotic attractors for encrypting a given message maybe can improve the privacy of chaotic encoding. A kind of hyperchaotic systems are studied by using some ...In chaotic cryptosysterns, using （very） high dimensional chaotic attractors for encrypting a given message maybe can improve the privacy of chaotic encoding. A kind of hyperchaotic systems are studied by using some classical methods. The results show that for improving the security of the chaotic cryptosystems, besides the high dimension, the sub-Nyquist sampling interval （SI） is also necessary. Then, we verify this result using the methods of time series analysis.展开更多
针对射频识别系统中标签与读卡器会话存在易被攻击者窃听等安全问题,提出一种基于R_LWE(Learning with Errors over Ring)密码体制加解密的RFID双向认证协议。协议采用R_LWE密码体制实现加密的同时引入交叉合成运算,既可确保安全性,亦...针对射频识别系统中标签与读卡器会话存在易被攻击者窃听等安全问题,提出一种基于R_LWE(Learning with Errors over Ring)密码体制加解密的RFID双向认证协议。协议采用R_LWE密码体制实现加密的同时引入交叉合成运算,既可确保安全性,亦可降低计算开销。结合不同攻击类型、逻辑形式化分析、性能角度综合分析,该协议具备安全等级高、计算量小等优势。展开更多
基金the Sichuan Provincial Youth Software Innovation Foundation (2004AA03692005AA0827).
文摘Current grid authentication frameworks are achieved by applying the standard SSL authentication protocol （SAP）. The authentication process is very complicated, and therefore, the grid user is in a heavily loaded point both in computation and in communication. Based on identity-based architecture for grid （IBAG） and corresponding encryption and signature schemes, an identity-based authentication protocol for grid is proposed. Being certificate-free, the authentication protocol aligns well with the demands of grid computing. Through simulation testing, it is seen that the authentication protocol is more lightweight and efficient than SAP, especially the more lightweight user side. This contributes to the larger grid scalability.
文摘针对现有大多数协议无法实现服务器、电子标签及读写器三方之间相互认证的缺陷,提出一种基于R-LWE(Learning with Errors over Ring)密码体制下可实现三方认证的协议。协议采用理想格对重要隐私信息进行加密,且加密同时混入不同随机数,既可保障隐私信息安全,亦可使得消息具备新鲜性和不确定性。对所设计协议进行安全性分析、基于GNY逻辑形式化证明、性能分析,结果表明该协议具备良好的安全要求、严谨的推理、性能优于其他对比协议。
文摘An enhaned NTRU cryptosystem eliminating decryption failures is proposed without using padding schemes and can resist the oracle model andchosen-ciphertext attacks. Because lattice reduction is the main threat to lattice-based cryptosystems, lattice reductionalgorithms are analyzed to evaluate the security of this scheme. Furthermore, the new scheme remains the advantage of high efficiency of original NTRU.
基金This project was supported by National"985"Engineering of China .
文摘In chaotic cryptosysterns, using （very） high dimensional chaotic attractors for encrypting a given message maybe can improve the privacy of chaotic encoding. A kind of hyperchaotic systems are studied by using some classical methods. The results show that for improving the security of the chaotic cryptosystems, besides the high dimension, the sub-Nyquist sampling interval （SI） is also necessary. Then, we verify this result using the methods of time series analysis.
文摘针对射频识别系统中标签与读卡器会话存在易被攻击者窃听等安全问题,提出一种基于R_LWE(Learning with Errors over Ring)密码体制加解密的RFID双向认证协议。协议采用R_LWE密码体制实现加密的同时引入交叉合成运算,既可确保安全性,亦可降低计算开销。结合不同攻击类型、逻辑形式化分析、性能角度综合分析,该协议具备安全等级高、计算量小等优势。
