Improved AB-CPREs with Revocability and HRA Security under LWE

IF 1.3 4区计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS IET Information Security Pub Date : 2024-09-26 DOI:10.1049/2024/4333883

Yang Wang, Mingqiang Wang

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Abstract

Attribute-based conditional proxy re-encryption protocols (AB-CPREs) enable a delegator to delegate his decryption rights via different policies and grant the data owner greater flexibility in allocating their encrypted private data stored in the cloud. However, existing lattice-based AB-CPREs suffer from some drawbacks such as large parameters and weak passive securities. To the best of our knowledge, the first quantum-safe key-policy AB-CPREs with polynomially bounded parameters (for certain NC ⁰ circuits/policies) that is selective attribute secure against honest re-encryption attacks (HRA) is presented. The security of our proposed AB-CPREs is based on standard LWE assumptions. We further introduce the directly revocable AB-CPREs, a primitive that enables a delegator to authorize and revoke his delegation of decryption rights dynamically and offers more flexible access control on externally stored encrypted data. Definition and security model of single-hop directly revocable AB-CPREs are given, and the first detailed construction of single-hop directly revocable AB-CPREs based on standard LWE assumptions is also proposed.

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LWE 下具有可撤销性和 HRA 安全性的改进型 AB-CPRE

基于属性的有条件代理重加密协议（AB-CPRE）使委托人能够通过不同的策略委托其解密权，并赋予数据所有者在分配其存储在云中的加密私人数据时更大的灵活性。然而，现有的基于网格的 AB-CPRE 存在一些缺点，如参数较大和被动安全性较弱。据我们所知，我们提出了第一种具有多项式有界参数（对于某些 NC 0 电路/策略）的量子安全密钥策略 AB-CPRE，它对诚实再加密攻击（HRA）具有选择性属性安全。我们提出的 AB-CPRE 的安全性基于标准的 LWE 假设。我们进一步介绍了可直接撤销的 AB-CPREs ，它是一种使委托人能够动态授权和撤销其解密权委托，并为外部存储的加密数据提供更灵活访问控制的基元。本文给出了单跳直接可撤销 AB-CPRE 的定义和安全模型，并首次提出了基于标准 LWE 假设的单跳直接可撤销 AB-CPRE 的详细构造。

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来源期刊

IET Information Security 工程技术-计算机：理论方法

CiteScore

3.80

自引率

7.10%

发文量

审稿时长

8.6 months

期刊介绍： IET Information Security publishes original research papers in the following areas of information security and cryptography. Submitting authors should specify clearly in their covering statement the area into which their paper falls. Scope: Access Control and Database Security Ad-Hoc Network Aspects Anonymity and E-Voting Authentication Block Ciphers and Hash Functions Blockchain, Bitcoin (Technical aspects only) Broadcast Encryption and Traitor Tracing Combinatorial Aspects Covert Channels and Information Flow Critical Infrastructures Cryptanalysis Dependability Digital Rights Management Digital Signature Schemes Digital Steganography Economic Aspects of Information Security Elliptic Curve Cryptography and Number Theory Embedded Systems Aspects Embedded Systems Security and Forensics Financial Cryptography Firewall Security Formal Methods and Security Verification Human Aspects Information Warfare and Survivability Intrusion Detection Java and XML Security Key Distribution Key Management Malware Multi-Party Computation and Threshold Cryptography Peer-to-peer Security PKIs Public-Key and Hybrid Encryption Quantum Cryptography Risks of using Computers Robust Networks Secret Sharing Secure Electronic Commerce Software Obfuscation Stream Ciphers Trust Models Watermarking and Fingerprinting Special Issues. Current Call for Papers: Security on Mobile and IoT devices - https://digital-library.theiet.org/files/IET_IFS_SMID_CFP.pdf