FFEC:在云环境中为多用户提供快速、前向安全的基于等价的密文可比性

IF 4.1 2区 计算机科学 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE
Sha Ma, Zhiqing Ye, Qiong Huang, Chengyu Jiang
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引用次数: 0

摘要

随着云计算的扩展,越来越多的敏感数据被加密并存储在公共云中,以减轻存储和管理负担。在云环境中,不同的用户数据都要进行处理,因此基于等价的多用户密码文本安全检索至关重要。带等价测试的公钥加密(PKEET)作为一种加密工具被引入,用于验证不同公钥下的两个密文是否包含相同的信息。然而,现有的 PKEET 方案由于其无限寿命,经常面临陷阱门被滥用的问题,可能导致用户隐私在未经授权的情况下被泄露。在本文中,我们通过采用前向安全 PKEET(FS-PKEET),为多用户提出了一种称为快速、前向安全等价比较(FFEC)的新方法。这种方法将检索过程限制在最近的陷阱门更新之前生成的密码文本上。我们提出了一种基于双线性配对的具体 FS-PKEET 方案,并利用随机甲骨文模型中的双线性 Diffie-Hellman (BDH) 假设证明了它的安全性。全面的性能评估表明,由于大大降低了陷阱门生成的成本,我们的工作在解密、陷阱门生成和测试执行方面都具有很高的效率,因此在云环境下的安全密文信息检索应用中非常实用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
FFEC: Fast and forward-secure equivalence-based ciphertext comparability for multiple users in cloud environment

With the expansion of cloud computing, an increasing amount of sensitive data is being encrypted and stored in public clouds to alleviate storage and management burdens. Secure equivalence-based retrieval of ciphertexts for multiple users is crucial in a cloud environment where diverse user data resides for processing purposes. Public key encryption with equality test (PKEET) has been introduced as a cryptographic tool to verify if two ciphertexts under different public keys contain the same message. However, existing PKEET schemes often face misuse of trapdoors due to their unlimited lifespan, potentially leading to unauthorized disclosure of user privacy. In this paper, we propose a novel approach called fast and forward-secure equivalence-based comparability (FFEC) for multiple users by employing a forward-secure PKEET (FS-PKEET). This restricts the retrieval process only to ciphertexts generated prior to the most recent trapdoor update. We present a concrete FS-PKEET scheme based on bilinear pairing and demonstrate its security using Bilinear Diffie–Hellman (BDH) assumption in the random oracle model. Comprehensive performance evaluation shows that our work has much efficiency of decryption, trapdoor generation and test execution thanks to greatly reducing the cost of trapdoor generation and thus is practical for the application of secure ciphertext information retrieval in cloud environment.

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来源期刊
Computer Standards & Interfaces
Computer Standards & Interfaces 工程技术-计算机:软件工程
CiteScore
11.90
自引率
16.00%
发文量
67
审稿时长
6 months
期刊介绍: The quality of software, well-defined interfaces (hardware and software), the process of digitalisation, and accepted standards in these fields are essential for building and exploiting complex computing, communication, multimedia and measuring systems. Standards can simplify the design and construction of individual hardware and software components and help to ensure satisfactory interworking. Computer Standards & Interfaces is an international journal dealing specifically with these topics. The journal • Provides information about activities and progress on the definition of computer standards, software quality, interfaces and methods, at national, European and international levels • Publishes critical comments on standards and standards activities • Disseminates user''s experiences and case studies in the application and exploitation of established or emerging standards, interfaces and methods • Offers a forum for discussion on actual projects, standards, interfaces and methods by recognised experts • Stimulates relevant research by providing a specialised refereed medium.
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