计算机工程与应用2024，Vol.60Issue(19)：268-277,10.DOI:10.3778/j.issn.1002-8331.2311-0339
带抵抗解密密钥暴露的可撤销身份基加密
Revocable Identity-Based Encryption with Decryption Key Exposure Resistance
摘要
Abstract
In revocable encryption schemes,a user's private key may be exposed if the decryption key is exposed.There-fore,constructing a lattice-based revocable encryption scheme with DKER is significant.Different from these schemes available,which implement the features of DKER by changing the user's private key,this scheme modifies the update key by using a bit decomposition function to broadcast the updated key encrypted by the user's public key.This ensures that even if the decryption key is exposed,it will not have any impact on the user's private key,thus achieving DKER.At the same time,this scheme provides formal security proof against selection time and adaptive selection identity attacks based on the DLWE hardness problem in the standard model.The results indicate that compared with some existing schemes,this scheme improves the efficiency of generating user private keys and decryption keys,and reduces the user's key storage space and ciphertext length.关键词
格密码/可撤销身份基加密/抵抗解密密钥暴露/高斯抽样Key words
lattice-based cryptography/revocable identity-based encryption/decryption key exposure resistance/Gaussian sampling分类
信息技术与安全科学引用本文复制引用
王晓毅,陈虎,赵姜冬..带抵抗解密密钥暴露的可撤销身份基加密[J].计算机工程与应用,2024,60(19):268-277,10.基金项目
江苏师范大学博士科研项目(16XLR031) （16XLR031）
江苏省研究生科研创新计划项目(2022XKT0950,2022XKT0951). （2022XKT0950,2022XKT0951）
