An Efficient Privacy-Preserving Outsourced Calculation Toolkit With Multiple Keys
An Efficient Privacy-Preserving Outsourced Calculation Toolkit With Multiple Keys
复制标题
具有多个密钥的高效保护隐私的外包计算工具包
DOI：
10.1109/tifs.2016.2573770
复制
发表时间：
2016-11-01
影响因子：
6.8
通讯作者：
Weng, Jian
中科院分区：
文献类型：
--
作者：
Liu, Ximeng;Deng, Robert H.;Weng, Jian
本文提出了一种基于多重加密密钥(EPOM)的高效隐私保护外包计算工具包。使用EPOM，大量用户可以安全地将他们的数据外包到云服务器进行存储。此外，属于多个用户的加密数据可以被处理，而不会损害单个用户的(原始)数据和最终计算结果的安全性。为了降低EPOM中的密钥管理开销和私钥暴露风险，提出了一种分布式双陷门公钥密码体制--核心密码原语。我们还提供了该工具包，以确保常用的整数运算可以跨不同的加密域安全地处理。证明了提出的EPOM实现了整数安全处理的目的，且不会导致数据的隐私泄露给未授权方。最后，通过仿真验证了EPOM的实用性和有效性。
In this paper, we propose a toolkit for efficient and privacy-preserving outsourced calculation under multiple encrypted keys (EPOM). Using EPOM, a large scale of users can securely outsource their data to a cloud server for storage. Moreover, encrypted data belonging to multiple users can be processed without compromising on the security of the individual user's (original) data and the final computed results. To reduce the associated key management cost and private key exposure risk in EPOM, we present a distributed two-trapdoor public-key cryptosystem, the core cryptographic primitive. We also present the toolkit to ensure that the commonly used integer operations can be securely handled across different encrypted domains. We then prove that the proposed EPOM achieves the goal of secure integer number processing without resulting in privacy leakage of data to unauthorized parties. Last, we demonstrate the utility and the efficiency of EPOM using simulations.