密码学报（中英文）2024，Vol.11Issue(6)：1256-1277,22.DOI:10.13868/j.cnki.jcr.000732
格上可撤销的基于身份的条件代理重加密方案
Revocable Identity-Based Conditional Proxy Re-Encryption Schemes over Lattice
摘要
Abstract
(Attribute-based)conditional proxy re-encryption schemes(AB-CPREs)enable a delega-tor to delegate his decryption rights via different policies,and offer an efficient solution for enforcing fine-grained access control on outsourced encrypted data.Recently,Liang et al.proposed the first lattice-based AB-CPREs with selective attribute security against chosen-plaintext attacks(CPA)at ESORICS 2021.Nevertheless,AB-CPREs may suffer some problems such as complicated key manage-ment.In this paper,definitions,security models and concrete constructions of revocable identity-based conditional proxy re-encryption schemes are given.The proposed revocable identity-based conditional proxy re-encryption schemes are key-policy attributed-based in the sense that key policy is used to enforce fine grained access control.It is shown that the proposed scheme is selective identity,selective time period,and selective attribute secure against chosen plaintext attacks under the assumption that corresponding LWE problems are hard.At the same time,the proposed scheme is also secure against the decryption key exposure attack.关键词
条件代理重加密体制/可撤销的基于身份的加密体制/格密码/LWE问题Key words
conditional proxy re-encryption/revocable identity-based encryption/lattice-based cryptography/LWE problems分类
信息技术与安全科学引用本文复制引用
王明强,王伟嘉,王洋,张雍杰..格上可撤销的基于身份的条件代理重加密方案[J].密码学报（中英文）,2024,11(6):1256-1277,22.基金项目
国家重点研发计划(2021YFA1000600) （2021YFA1000600）
山东省重点研发计划(2022CXGC020101) （2022CXGC020101）
保密通信全国重点实验室稳定支持计划项目(2024,WD202402) （2024,WD202402）
密码科学技术全国重点实验室开放课题(MMKFKT202207) （MMKFKT202207）
山东省青年基金(ZR2022QF039)National Key Research and Development Program of China(2021YFA1000600) （ZR2022QF039）
Key Research and Development Program of Shandong Province(2022CXGC020101) （2022CXGC020101）
Stability Program of National Key Laboratory of Security Communication(2024,WD202402) （2024,WD202402）
Open Research Fund of State Key Laboratory of Cryptology(MMK-FKT202207) （MMK-FKT202207）
Natural Science Foundation of Shandong Province(ZR2022QF039) （ZR2022QF039）
