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Efficient Key-Aggregate Proxy Re-Encryption for Secure Data Sharing in Clouds

机译:高效的密钥聚合代理重新加密,可在云中安全共享数据

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Cloud computing undoubtedly is the most unparalleled technique in rapidly developing industries. Protecting sensitive files stored in the clouds from being accessed by malicious attackers is essential to the success of the clouds. In proxy re-encryption schemes, users delegate their encrypted files to other users by using re-encryption keys, which elegantly transfers the users' burden to the cloud servers. Moreover, one can adopt conditional proxy re-encryption schemes to employ their access control policy on the files to be shared. However, we recognize that the size of re-encryption keys will grow linearly with the number of the condition values, which may be impractical in low computational devices. In this paper, we combine a key-aggregate approach and a proxy re-encryption scheme into a key-aggregate proxy re-encryption scheme. It is worth mentioning that the proposed scheme is the first key-aggregate proxy re-encryption scheme. As a side note, the size of re-encryption keys is constant.
机译:云计算无疑是快速发展的行业中最无与伦比的技术。保护云中存储的敏感文件不受恶意攻击者的访问,对于云的成功至关重要。在代理重新加密方案中,用户使用重新加密密钥将其加密文件委派给其他用户,从而将用户的负担优雅地转移到云服务器上。而且,可以采用条件代理重新加密方案来对要共享的文件采用其访问控制策略。但是,我们认识到,重新加密密钥的大小将随着条件值的数量线性增加,这在低计算量的设备中可能不切实际。在本文中,我们将密钥聚合方法和代理重新加密方案组合为密钥聚合代理重新加密方案。值得一提的是,该方案是第一个密钥聚合代理重加密方案。附带说明一下,重新加密密钥的大小是恒定的。

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