In order to improve performance and security of image encryption algorithm effectively based on chaotic sequences, an extended chaotic sequence generating method is presented based on logistic chaotic system using Ber...In order to improve performance and security of image encryption algorithm effectively based on chaotic sequences, an extended chaotic sequence generating method is presented based on logistic chaotic system using Bernstein form Bézier curve generating algorithm. In order to test the pseudorandom performance of the extended chaotic sequence, we also analyze random performance, autocorrelation performance, and balance performance of the extended chaotic sequence. Simulation results show that the extended chaotic sequence generated using our method is pseudorandom and its correlation performance and balance performance are good. As an application, we apply the extended chaotic sequence in image encryption algorithm, the simulation results show that the performance of the encrypted image using our method is better than that using logistic chaotic sequence.展开更多
This paper proposes an image encryption algorithm LQBPNN（logistic quantum and back propagation neural network）based on chaotic sequences incorporating quantum keys. Firstly, the improved one-dimensional logistic cha...This paper proposes an image encryption algorithm LQBPNN（logistic quantum and back propagation neural network）based on chaotic sequences incorporating quantum keys. Firstly, the improved one-dimensional logistic chaotic sequence is used as the basic key sequence. After the quantum key is introduced, the quantum key is incorporated into the chaotic sequence by nonlinear operation. Then the pixel confused process is completed by the neural network. Finally, two sets of different mixed secret key sequences are used to perform two rounds of diffusion encryption on the confusing image. The experimental results show that the randomness and uniformity of the key sequence are effectively enhanced. The algorithm has a secret key space greater than 2182. The adjacent pixel correlation of the encrypted image is close to 0, and the information entropy is close to 8. The ciphertext image can resist several common attacks such as typical attacks, statistical analysis attacks and differential attacks.展开更多
As the only approved Identity-Based Encryption scheme in China that is also standardized by ISO,SM9-IBE has been widely adopted in many real-world applications.However,similar to other IBE standard algorithms,SM9-IBE ...As the only approved Identity-Based Encryption scheme in China that is also standardized by ISO,SM9-IBE has been widely adopted in many real-world applications.However,similar to other IBE standard algorithms,SM9-IBE currently lacks revocation mechanism,which is vital for a real system.Worse still,we find that existing revocable techniques may not be suitable and efficient when applying to SM9-IBE.Given the widespread use of SM9-IBE,an efficient and robust user revocation mechanism becomes an urgent issue.In this work,we propose a dedicated server-aided revocation mechanism,which for the first time achieves the secure,immediate and robust user revocation for SM9-IBE.Provided with a compact system model,the proposed method leverages an existing server to perform all heavy workloads during user revocation,thus leaving no communication and computation costs for the key generation center and users.Moreover,the mechanism supports key-exposure resistance,meaning the user revocation mechanism is robust even if the revocation key leaks.We then formally define and prove the security.At last,we present theoretical comparisons and an implementation in terms of computational latency and throughput.The results indicate the efficiency and practicability of the proposed mechanism.展开更多
As the only approved Identity-Based Encryption scheme in China that is also standardized by ISO,SM9-IBE has been widely adopted in many real-world applications.However,similar to other IBE standard algorithms,SM9-IBE ...As the only approved Identity-Based Encryption scheme in China that is also standardized by ISO,SM9-IBE has been widely adopted in many real-world applications.However,similar to other IBE standard algorithms,SM9-IBE currently lacks revocation mechanism,which is vital for a real system.Worse still,we find that existing revocable techniques may not be suitable and efficient when applying to SM9-IBE.Given the widespread use of SM9-IBE,an efficient and robust user revocation mechanism becomes an urgent issue.In this work,we propose a dedicated server-aided revocation mechanism,which for the first time achieves the secure,immediate and robust user revocation for SM9-IBE.Provided with a compact system model,the proposed method leverages an existing server to perform all heavy workloads during user revocation,thus leaving no communication and computation costs for the key generation center and users.Moreover,the mechanism supports key-exposure resistance,meaning the user revocation mechanism is robust even if the revocation key leaks.We then formally define and prove the security.At last,we present theoretical comparisons and an implementation in terms of computational latency and throughput.The results indicate the efficiency and practicability of the proposed mechanism.展开更多
基金the National Natural Science Foundation of China (No. 60572133)the Scientific Research Fund of Education Department of Shaanxi Province (No.06JK193)
文摘In order to improve performance and security of image encryption algorithm effectively based on chaotic sequences, an extended chaotic sequence generating method is presented based on logistic chaotic system using Bernstein form Bézier curve generating algorithm. In order to test the pseudorandom performance of the extended chaotic sequence, we also analyze random performance, autocorrelation performance, and balance performance of the extended chaotic sequence. Simulation results show that the extended chaotic sequence generated using our method is pseudorandom and its correlation performance and balance performance are good. As an application, we apply the extended chaotic sequence in image encryption algorithm, the simulation results show that the performance of the encrypted image using our method is better than that using logistic chaotic sequence.
基金supported by National Natural Science Foundation of China (No. 61402012)Doctor Foundation of Anhui University of Science and Technology
文摘This paper proposes an image encryption algorithm LQBPNN（logistic quantum and back propagation neural network）based on chaotic sequences incorporating quantum keys. Firstly, the improved one-dimensional logistic chaotic sequence is used as the basic key sequence. After the quantum key is introduced, the quantum key is incorporated into the chaotic sequence by nonlinear operation. Then the pixel confused process is completed by the neural network. Finally, two sets of different mixed secret key sequences are used to perform two rounds of diffusion encryption on the confusing image. The experimental results show that the randomness and uniformity of the key sequence are effectively enhanced. The algorithm has a secret key space greater than 2182. The adjacent pixel correlation of the encrypted image is close to 0, and the information entropy is close to 8. The ciphertext image can resist several common attacks such as typical attacks, statistical analysis attacks and differential attacks.
基金This work was partially supported by National Natural Science Foundation of China(Nos.61772520,61802392,61972094,61472416,61632020)Key Research and Development Project of Zhejiang Province(Nos.2017C01062,2020C01078)Beijing Municipal Science&Technology Commission(Project Number.Z191100007119007,Z191100007119002).
文摘As the only approved Identity-Based Encryption scheme in China that is also standardized by ISO,SM9-IBE has been widely adopted in many real-world applications.However,similar to other IBE standard algorithms,SM9-IBE currently lacks revocation mechanism,which is vital for a real system.Worse still,we find that existing revocable techniques may not be suitable and efficient when applying to SM9-IBE.Given the widespread use of SM9-IBE,an efficient and robust user revocation mechanism becomes an urgent issue.In this work,we propose a dedicated server-aided revocation mechanism,which for the first time achieves the secure,immediate and robust user revocation for SM9-IBE.Provided with a compact system model,the proposed method leverages an existing server to perform all heavy workloads during user revocation,thus leaving no communication and computation costs for the key generation center and users.Moreover,the mechanism supports key-exposure resistance,meaning the user revocation mechanism is robust even if the revocation key leaks.We then formally define and prove the security.At last,we present theoretical comparisons and an implementation in terms of computational latency and throughput.The results indicate the efficiency and practicability of the proposed mechanism.
基金partially supported by National Natural Science Foundation of China(Nos.61772520,61802392,61972094,61472416,61632020)Key Research and Development Project of Zhejiang Province(Nos.2017C01062,2020C01078)Beijing Municipal Science&Technology Commission(Project Number.Z191100007119007,Z191100007119002).
文摘As the only approved Identity-Based Encryption scheme in China that is also standardized by ISO,SM9-IBE has been widely adopted in many real-world applications.However,similar to other IBE standard algorithms,SM9-IBE currently lacks revocation mechanism,which is vital for a real system.Worse still,we find that existing revocable techniques may not be suitable and efficient when applying to SM9-IBE.Given the widespread use of SM9-IBE,an efficient and robust user revocation mechanism becomes an urgent issue.In this work,we propose a dedicated server-aided revocation mechanism,which for the first time achieves the secure,immediate and robust user revocation for SM9-IBE.Provided with a compact system model,the proposed method leverages an existing server to perform all heavy workloads during user revocation,thus leaving no communication and computation costs for the key generation center and users.Moreover,the mechanism supports key-exposure resistance,meaning the user revocation mechanism is robust even if the revocation key leaks.We then formally define and prove the security.At last,we present theoretical comparisons and an implementation in terms of computational latency and throughput.The results indicate the efficiency and practicability of the proposed mechanism.
