通信学报2024，Vol.45Issue(8)：20-36,17.DOI:10.11959/j.issn.1000-436x.2024142
密文长度固定的策略部分隐藏多授权机构CP-ABE方案
Partially hidden policy multi-authority CP-ABE scheme with constant length ciphertext
摘要
Abstract
To solve the problems of low security and high resource overhead of existing hidden policy ciphertext policy attribute-based encryption(CP-ABE)schemes,a partially hidden policy multi-authority CP-ABE scheme with constant length ciphertext was proposed.Firstly,the values of the attributes in the access policy were hidden,enabling the pro-posed scheme to reduce the risk of private data leakage.Secondly,by fixing the ciphertext length and using outsourcing decryption techniques,the resource overhead for the user was reduced in the proposed scheme.Finally,the multi-authority management mechanism was used so that the proposed scheme avoided the key escrow problem that can easily arise when using a single authoritative authority.The security analysis proves that the proposed scheme satisfies the in-distinguishability under chosen plaintext attack in the standard model,as well as the scheme's hidden access policy and the generated outsourcing key can resist attribute value guessing attack.The overall resource overhead of the proposed scheme is proven to be lower by comparing its performance with the existing schemes.关键词
密文策略属性加密/策略部分隐藏/密文长度固定/多授权机构/外包解密Key words
CP-ABE/policy partially hidden/constant ciphertext length/multi-authority/outsourcing decryption分类
信息技术与安全科学引用本文复制引用
刘怡龙,许盛伟,岳梓岩..密文长度固定的策略部分隐藏多授权机构CP-ABE方案[J].通信学报,2024,45(8):20-36,17.基金项目
国家重点研发计划基金资助项目(No.2022YFB3104402) The National Key Research and Development Program of China(No.2022YFB3104402) （No.2022YFB3104402）
