Conditional proxy re-encryption(CPRE)is an effective cryptographic primitive language that enhances the access control mechanism and makes the delegation of decryption permissions more granular,but most of the attribu...Conditional proxy re-encryption(CPRE)is an effective cryptographic primitive language that enhances the access control mechanism and makes the delegation of decryption permissions more granular,but most of the attribute-based conditional proxy re-encryption(AB-CPRE)schemes proposed so far do not take into account the importance of user attributes.A weighted attribute-based conditional proxy re-encryption(WAB-CPRE)scheme is thus designed to provide more precise decryption rights delegation.By introducing the concept of weight attributes,the quantity of system attributes managed by the server is reduced greatly.At the same time,a weighted tree structure is constructed to simplify the expression of access structure effectively.With conditional proxy re-encryption,large amounts of data and complex computations are outsourced to cloud servers,so the data owner(DO)can revoke the user’s decryption rights directly with minimal costs.The scheme proposed achieves security against chosen plaintext attacks(CPA).Experimental simulation results demonstrated that the decryption time is within 6–9 ms,and it has a significant reduction in communication and computation cost on the user side with better functionality compared to other related schemes,which enables users to access cloud data on devices with limited resources.展开更多
The sharing of pathological data is highly important in various applications,such as remote diagnosis,graded diagnosis,illness treatment,and specialist system development.However,ensuring reliable,secure,privacy-prese...The sharing of pathological data is highly important in various applications,such as remote diagnosis,graded diagnosis,illness treatment,and specialist system development.However,ensuring reliable,secure,privacy-preserving,and efficient sharing of pathological data poses significant challenges.This paper presents a novel solution that leverages blockchain technology to ensure reliability in pathological data sharing.Additionally,it employs conditional proxy re-encryption(C-PRE)and public key encryption with equality test technology to control the scope and preserve the privacy of shared data.To assess the practicality of our solution,we implemented a prototype system using Hyperledger Fabric and conducted evaluations with various metrics.We also compared the solution with relevant schemes.The results demonstrate that the proposed solution effectively meets the requirements for pathological data sharing and is practical in production scenarios.展开更多
基金Programs for Science and Technology Development of Henan Province,grant number 242102210152The Fundamental Research Funds for the Universities of Henan Province,grant number NSFRF240620+1 种基金Key Scientific Research Project of Henan Higher Education Institutions,grant number 24A520015Henan Key Laboratory of Network Cryptography Technology,grant number LNCT2022-A11.
文摘Conditional proxy re-encryption(CPRE)is an effective cryptographic primitive language that enhances the access control mechanism and makes the delegation of decryption permissions more granular,but most of the attribute-based conditional proxy re-encryption(AB-CPRE)schemes proposed so far do not take into account the importance of user attributes.A weighted attribute-based conditional proxy re-encryption(WAB-CPRE)scheme is thus designed to provide more precise decryption rights delegation.By introducing the concept of weight attributes,the quantity of system attributes managed by the server is reduced greatly.At the same time,a weighted tree structure is constructed to simplify the expression of access structure effectively.With conditional proxy re-encryption,large amounts of data and complex computations are outsourced to cloud servers,so the data owner(DO)can revoke the user’s decryption rights directly with minimal costs.The scheme proposed achieves security against chosen plaintext attacks(CPA).Experimental simulation results demonstrated that the decryption time is within 6–9 ms,and it has a significant reduction in communication and computation cost on the user side with better functionality compared to other related schemes,which enables users to access cloud data on devices with limited resources.
基金supported by National Natural Science Foundation of China under Grant 61972438Wuhu Science and Tech-nology Plan Project under Grant 2022yf50Key Research and Develop-ment Projects in Anhui Province under Grant 202004a05020002 and 2022a05020049.
文摘The sharing of pathological data is highly important in various applications,such as remote diagnosis,graded diagnosis,illness treatment,and specialist system development.However,ensuring reliable,secure,privacy-preserving,and efficient sharing of pathological data poses significant challenges.This paper presents a novel solution that leverages blockchain technology to ensure reliability in pathological data sharing.Additionally,it employs conditional proxy re-encryption(C-PRE)and public key encryption with equality test technology to control the scope and preserve the privacy of shared data.To assess the practicality of our solution,we implemented a prototype system using Hyperledger Fabric and conducted evaluations with various metrics.We also compared the solution with relevant schemes.The results demonstrate that the proposed solution effectively meets the requirements for pathological data sharing and is practical in production scenarios.
