通信学报2018，Vol.39Issue(5)：123-133,11.DOI:10.11959/j.issn.1000-436x.2018083
支持高效密文密钥同步演化的安全数据共享方案
Secure data sharing scheme supporting efficient synchronous evolution for ciphertext and key
摘要
Abstract
The static property of stored ciphertext in cloud increases the probability that an attacker can crack the ciphertext by obtaining a key, while ciphertext and key updates based on key distribution and re-encryption are exces-sively expensive. For this problem, a secure data sharing scheme supporting efficient synchronous evolution for ciphertext and key (CKSE-SDS) was proposed. By introducing cryptography accumulator in broadcast encryption, mim-icry transformation factor could be constructed supporting time-hopping periodically and efficient synchronous evolution for ciphertext and key could be achieved based on dynamic segmentation and fusion of ciphertext and key, which reduced certainty in the process of encryption and key distribution and increased the difficulty for attackers exploiting security vulnerabilities to obtain key to crack ciphertext as well. Theoretical analysis and security proofs show that the proposed scheme can support secure and efficient data access as well as reduce the probability of a successful attack effectively for an attacker, which can also enhance the system's active security defense capability.关键词
云存储/广播加密/密码学累加器/数据共享/同步演化Key words
cloud storage/broadcast encryption/cryptography accumulator/data sharing/synchronous evolution分类
信息技术与安全科学引用本文复制引用
严新成,陈越,贾洪勇,陈彦如,张馨月..支持高效密文密钥同步演化的安全数据共享方案[J].通信学报,2018,39(5):123-133,11.基金项目
国家重点基础研究发展计划("973"计划)基金资助项目(No.2012CB315901) （"973"计划）
河南省科技攻关计划基金资助项目(No.172102210017)The National Basic Research Program of China(973 Program)(No.2012CB315901),The Key Technologies R&D Program of Henan Province(No.172102210017) （No.172102210017）
