中圖分類號(hào)： TP309.7
文獻(xiàn)標(biāo)識(shí)碼： A
DOI： 10.19358/j.issn.2096-5133.2021.08.002
引用格式： 郭凱陽(yáng)，韓益亮，吳日銘。 基于RLWE的可撤銷分層屬性加密方案[J].信息技術(shù)與網(wǎng)絡(luò)安全，2021，40（8）：9-16.

Revocable hierarchical attribute-based encryption scheme from RLWE

Abstract： Aiming at the problems of operation efficiency and attribute update in attribute encryption scheme, this paper proposes a revocable hierarchical attribute encryption scheme based on learning with error over ring(RLWE). The attributes are layered by multi-level threshold secret sharing matrix. The ability of recovering secret of attribute with high privilege level is greater than that of attribute with low privilege level, and the attribute with high privilege level can not be replaced. In addition, based on the third-party mechanism, the system reduces the computing cost by controlling the users to obtain the attribute trapdoor. The scheme can resist user collusion attack and satisfies the chosen plaintext security under random oracle model. Compared with the existing schemes, this scheme not only realizes the revocability of attributes, but also adds the function of attribute hierarchy, and performs operations on the polynomial ring, which improves the efficiency of encryption and decryption, and has better adaptability to practical application scenarios.

Key words : attribute-based encryption；attribute revocation；hierarchical；lattice