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arXiv 2505.02409cs.CR
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使用同态加密的加密联邦搜索

Encrypted Federated Search Using Homomorphic Encryption

Om Rathod, Aastha Baid, Aswani Kumar Cherukuri

AI总结:

本文提出一种基于同态加密的隐私保护联邦搜索系统,使执法机构能在不解密数据的情况下跨分布式加密犯罪数据库执行查询,并集成CKKS与BFV方案以兼顾实时性、安全性和可扩展性。

摘要:

机构之间的信息共享对于应对跨司法辖区的犯罪活动十分有效;然而,出于对数据隐私、所有权和合规性的担忧,此类共享往往受到限制。为此,本工作提出了一种隐私保护的联邦搜索系统,该系统利用同态加密(Homomorphic Encryption,HE)使执法机构能够在加密的犯罪数据库上执行查询。这里的关键创新在于能够跨分布式数据库执行加密查询,而无需解密数据,从而保持端到端的机密性。本质上,该方法满足了出于国家安全和监管合规利益而提出的严格隐私要求。该系统集成了嵌入在 TenSEAL 中的 CKKS 和 BFV 方案,每个机构在集中式密钥管理表中持有自己的密钥对。在这种联邦搜索中,加密查询在服务器端进行计算,只有获得授权的客户端才能解密计算结果。机构之间的匹配可以灵活地实时工作,同时具有安全性和可扩展性,并保持对数据的控制以及过程的完整性。实验结果验证了该模型。本文还提供了实现代码和其他细节。

英文摘要:

The sharing of information between agencies is effective in dealing with cross-jurisdictional criminal activities; however, such sharing is often restricted due to concerns about data privacy, ownership, and compliance. Towards this end, this work has introduced a privacy-preserving federated search system that allows law enforcement agencies to conduct queries on encrypted criminal databases by utilizing Homomorphic Encryption (HE). The key innovation here is the ability to execute encrypted queries across distributed databases, without the decryption of the data, thus preserving end-to-end confidentiality. In essence, this approach meets stringent privacy requirements in the interests of national security and regulatory compliance. The system incorporates the CKKS and BFV scheme embedded within TenSEAL, with each agency holding its key pair in a centralized key management table. In this federated search, encrypted queries are computed on the server side, and only authorized clients can decrypt the computed results. The matching of agencies is flexible for working in real-time while at the same time being secure and scalable while preserving control over data and the integrity of the process. Experimental results demonstrate the model. This paper also provide the implementation code and other details.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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