网络与信息安全学报2026，Vol.12Issue(2)：65-82,18.DOI:10.11959/j.issn.2096-109x.AQ25251
SI-CP-ABE:一类基于同源的密文策略属性基加密方案
SI-CP-ABE:an isogeny-based ciphertext-policy attribute-based encryption scheme
摘要
Abstract
Ciphertext-policy attribute-based encryption(CP-ABE)serves as a fundamental cryptographic primitive for fine-grained data access control.However,existing schemes,primarily based on bilinear maps or lattice hard-ness assumptions,generally suffer from large system parameters,key sizes,and ciphertext sizes,which severely re-strict their deployment in resource-constrained scenarios.To address this challenge,a novel CP-ABE scheme based on supersingular elliptic curve isogeny(SI-CP-ABE)is proposed.This scheme integrates the action of isogeny ideal class group with linear secret sharing schemes,achieving efficient fine-grained access control in a post-quantum security setting.Regarding security,two new hardness assumptions—P+-CSSCDH and P+-CSSDDH—are proposed,based on which the scheme is rigorously proven to satisfy indistinguishability under chosen plaintext at-tack in the selective security model.To further enhance performance,an optimized scheme is designed based on SI-CP-ABE.Furthermore,based on the core algebraic structure of SI-CP-ABE,a post-quantum Naor-Reingold-type pseudo-random function with authentication capability is constructed,thereby enriching the building blocks for post-quantum cryptographic protocols.关键词
同源密码/密文策略属性基加密/SiGamal/线性秘密共享方案Key words
isogeny-based cryptography/ciphertext-policy attribute-based encryption/SiGamal/linear secret shar-ing scheme分类
信息技术与安全科学引用本文复制引用
陈淅文,陈锦榕,徐铮,周子健..SI-CP-ABE:一类基于同源的密文策略属性基加密方案[J].网络与信息安全学报,2026,12(2):65-82,18.基金项目
国家自然科学基金资助项目(No.62202475,No.12501731,No.12371013) （No.62202475,No.12501731,No.12371013）
"量子通信与量子计算机"国家科技重大专项资助项目(No.2021ZD0302902) The National Natural Science Foundation of China(No.62202475,No.12501731,No.12371013),Quantum Science and Technology-National Science and Technology Major Project(No.2021ZD0302902) （No.2021ZD0302902）
