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所属单位：计算机科学与技术学院/人工智能学院/软件学院

发表刊物：Comput Electr Eng

摘要：With the development of cloud technology, sharing date between users securely becomes more and more important. Moreover, the cloud server should provide a flexible control on sharing date. This work presents a notion named fuzzy conditional broadcast proxy re-encryption (FC-BPRE), in which a semi-honest proxy can transform a delegator's ciphertext to a new ciphertext for a set of delegatees when the ciphertext satisfies a certain condition set by the delegator. However, the proxy cannot learn any useful information about the underlying plaintext. The proxy can convert a ciphertext, encrypted under a condition set W, to a ciphertext encrypted under a condition set W′ using a broadcast re-encryption key, if and only if S and S′ are close to each other. We first formalize the notion of FC-PBRE scheme and then proposed a construction. © 2018 Elsevier Ltd

ISSN号：0045-7906

是否译文：否

发表时间：2018-08-01

合写作者：葛春鹏,葛春鹏,黄志球,王建东

通讯作者：方黎明,葛春鹏