Cloud computing, a recently emerged paradigm faces major challenges in achieving the privacy of migrated data, network security, etc. Too many cryptographic technologies are raised to solve these issues based on ident...Cloud computing, a recently emerged paradigm faces major challenges in achieving the privacy of migrated data, network security, etc. Too many cryptographic technologies are raised to solve these issues based on identity, attributes and prediction algorithms yet;these techniques are highly prone to attackers. This would raise a need of an effective encryption technique, which would ensure secure data migration. With this scenario, our proposed methodology Efficient Probabilistic Public Key Encryption(EPPKE) is optimized with Covariance Matrix Adaptation Evolution Strategies(CMA-ES). It ensures data integrity through the Luhn algorithm with BLAKE 2b encapsulation. This enables an optimized security to the data which is migrated through cloud. The proposed methodology is implemented in Open Stack with Java Language. It achieves better results by providing security compared to other existing techniques like RSA, IBA, ABE, PBE, etc.展开更多
An electronic contract is a contract signed by electronic means,which is widely used in electronic commerce activities.In recent years,with the rapid development of quantum cryptography technology,the quantum electron...An electronic contract is a contract signed by electronic means,which is widely used in electronic commerce activities.In recent years,with the rapid development of quantum cryptography technology,the quantum electronic contract has been widely studied by researchers.Supported by the basic principles of quantum mechanics,a quantum electronic contract scheme based on the single photon is proposed in this paper.In this scheme,two copies of the same contract are signed by both parties involved,and then a copy of each contract is sent to a trusted third party.The trusted third party verifies the signatures of both parties and compares the signed copies to determine whether the contract is valid.Compared with the previous scheme,this scheme is based on the quantum electronic contract signed by the single photon.Because the single photon is easy to prepare and operate,this scheme is simple and easy to implement.At the same time,the scheme does not need to exchange signatures between the two parties,which reduces the complexity of communication.Nevertheless,it requires both parties and the third party to be honest and trustworthy.展开更多
Location k-anonymity techniques typically use anony- mous spatial region to ensure privacy. But these solutions are vul- nerable to multiple queries attacks and inference attacks. Failing to account for the obstacle i...Location k-anonymity techniques typically use anony- mous spatial region to ensure privacy. But these solutions are vul- nerable to multiple queries attacks and inference attacks. Failing to account for the obstacle in geographic space is a severe problem since adversaries will surely regard these constraints. A novel framework is proposed to enhance location-dependent queries, based on the theoretical work of k-anonymity and Voronoi diagrams, allows a user to express service requirement and privacy require- ment by specifying a region and an appropriate value ofk. A trusted anonymity server form a restricted set (k, r, s), which is composed of a number of discrete points to meet the requirements for location k-anonymity and location /-diversity. The location-based services (LBS) server implements an efficient algorithm for continu- ous-region-query processing. Simulation results demonstrated that the framework is superior to previous works in terms of privacy. Moreover, discreteness and randomness of the anonymous set are conducive to resisting location tracking attacks.展开更多
文摘Cloud computing, a recently emerged paradigm faces major challenges in achieving the privacy of migrated data, network security, etc. Too many cryptographic technologies are raised to solve these issues based on identity, attributes and prediction algorithms yet;these techniques are highly prone to attackers. This would raise a need of an effective encryption technique, which would ensure secure data migration. With this scenario, our proposed methodology Efficient Probabilistic Public Key Encryption(EPPKE) is optimized with Covariance Matrix Adaptation Evolution Strategies(CMA-ES). It ensures data integrity through the Luhn algorithm with BLAKE 2b encapsulation. This enables an optimized security to the data which is migrated through cloud. The proposed methodology is implemented in Open Stack with Java Language. It achieves better results by providing security compared to other existing techniques like RSA, IBA, ABE, PBE, etc.
基金This work is supported by NSFC(Grant Nos.61572086,61402058)Sichuan Science and Technology Program(Grant Nos.2017JY0168,2018TJPT0012,2018GZ0232,2018CC0060,2017GFW0119,2017GZ0006,2016GFW0127)+2 种基金the National Key Research and Development Program(No.2017YFB0802302)Sichuan innovation team of quantum security communication(No.17TD0009)Sichuan academic and technical leaders training funding support projects(No.2016120080102643).
文摘An electronic contract is a contract signed by electronic means,which is widely used in electronic commerce activities.In recent years,with the rapid development of quantum cryptography technology,the quantum electronic contract has been widely studied by researchers.Supported by the basic principles of quantum mechanics,a quantum electronic contract scheme based on the single photon is proposed in this paper.In this scheme,two copies of the same contract are signed by both parties involved,and then a copy of each contract is sent to a trusted third party.The trusted third party verifies the signatures of both parties and compares the signed copies to determine whether the contract is valid.Compared with the previous scheme,this scheme is based on the quantum electronic contract signed by the single photon.Because the single photon is easy to prepare and operate,this scheme is simple and easy to implement.At the same time,the scheme does not need to exchange signatures between the two parties,which reduces the complexity of communication.Nevertheless,it requires both parties and the third party to be honest and trustworthy.
基金Supported by the National Natural Science Foundation of China(61472097)Specialized Research Fund for the Doctoral Program of Higher Education of China(20132304110017)Natural Science Foundation of Heilongjiang Province of China(F2015022)
文摘Location k-anonymity techniques typically use anony- mous spatial region to ensure privacy. But these solutions are vul- nerable to multiple queries attacks and inference attacks. Failing to account for the obstacle in geographic space is a severe problem since adversaries will surely regard these constraints. A novel framework is proposed to enhance location-dependent queries, based on the theoretical work of k-anonymity and Voronoi diagrams, allows a user to express service requirement and privacy require- ment by specifying a region and an appropriate value ofk. A trusted anonymity server form a restricted set (k, r, s), which is composed of a number of discrete points to meet the requirements for location k-anonymity and location /-diversity. The location-based services (LBS) server implements an efficient algorithm for continu- ous-region-query processing. Simulation results demonstrated that the framework is superior to previous works in terms of privacy. Moreover, discreteness and randomness of the anonymous set are conducive to resisting location tracking attacks.