格上高效且可撤销的密文策略属性基加密方案

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中图分类号：TP309 文献标志码：A DOI：10.12305/j.issn.1001-506X.2025.04.33

Abstract：To address the problems existing in attribute-based encryption schemes on lattice such as low computational eficiency，inflexible access policy expression，and lack of revocation，an eficient and revocable ciphertext-policy atribute-based encryption scheme on lattice is proposed. It uses small policy matrices and higher base sampling algorithms under the ring learning with errors assumption to reduce cumulative erors and improve computational eficiency of the proposed scheme.By integrating linear secret sharing and the ring learning with erors assumption，flexible and eficient access policy expression is achieved.Additionally，by adding direct revocation to the access policy，the proposed scheme not only has eficient expresson，but also has the userrevocation function. The proposed scheme can resist the chosen plaintext attack under the ring learning with erors assumption. The simulation results show the effectivenessand practicability of the proposed scheme.

Keywords：attribute-based encryption； linear secret sharing；user revocation； ring learning with errors; small policy matrix

0引言

MordorIntelligence报告指出，截止到2023年，云存储的市场规模已达94.45亿美元，并在未来不断增加。（剩余20404字）