支持属性撤销和解密外包的属性基加密方案

doi:10.3969/j.issn.1001-2400.2015.06.002

Abstract

Abstract:

Aiming to tackle the attribute revocation issue and reduce the user's computational overheads, an attribute-based encryption scheme is proposed and it can support attribute revocation and decryption outsourcing. In the proposed scheme, the splitting and reconstruction of secrets is realized by the linear secret sharing technique, and key update is based on the KEK(Key Encrypting Key) tree. In decryption, our scheme outsources some decryption computational tasks to a decryption service provider, which reduces the computational cost on users' side. Security analysis indicates that the proposed scheme can resist collusion attack, and ensure data confidentiality and forward/backward secrecy. Experimental results show that the efficiency of ciphertext update and decryption is improved in terms of time cost.

Key words: attribute-based encryption, attribute, revocation, outsourcing

CLC Number:

TN918

MA Hua;BAI Cuicui;LI Bin;LIU Zhenhua. Attribute-based encryption scheme supporting attribute revocation and decryption outsourcing[J].J4, 2015, 42(6): 6-10+55.

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Attribute-based encryption scheme supporting attribute revocation and decryption outsourcing

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