权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

COED: Computing on Encrypted Data

COED：加密数据计算

基本信息

批准号：
EP/I03126X/1
负责人：
Nigel Smart
金额：
$ 120.61万
依托单位：
University of Bristol
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2011
资助国家：
英国
起止时间：
2011 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FI03126X%2F1
关键词：
COED Computing Encrypted Data

项目摘要

Whilst encrypting data keeps data secret, a major problem occurs when one wants to process encrypted data. Currently this involves performing the decryption, then performing a calculation and then re-encrypting the data. Which is costly, and assumes the person carrying out the computation can be trusted with the data. Consider the of an outsourced database in more detail. An owner of some data currently maintains their own database system. The idea behind cloud services is to enable the database owner to delegate the storage of the databased to someone else. To do this they pay a third party provider to host it for them. But now they need to trust this third party to maintain the privacy of the data. One way around this problem would be for the data to be encrypted before the owner passes it over to the provider. However, now it would seem hard for the data owner to search and query the database (without downloading it from the third party, hence invalidating the whole motivation for outsourcing).Theoretically we know of much more secure techniques. Namely, we can compute on the encrypted data without needing to perform decryptions. There are a number of approaches to this problem, from fully-homomorphic encryption through to multi-party computation. Indeed the the last couple of years have seen amazing advances being made in these areas. This project aims to take these theoretical approaches and examine more closely the barriers to true practicality. This will be done using a combination of theoretical and practical expertise which is unique to the Cryptography group in Bristol.

虽然加密数据可以保持数据的机密性，但当想要处理加密数据时，会出现一个主要问题。目前，这包括执行解密，然后执行计算，然后重新加密数据。这是昂贵的，并且假设执行计算的人可以信任数据。更详细地考虑外包数据库的情况。某些数据的所有者目前维护自己的数据库系统。云服务背后的思想是使数据库所有者能够将数据库的存储委托给其他人。为了做到这一点，他们付钱给第三方提供商来为他们托管。但现在他们需要信任第三方来维护数据的隐私。解决这个问题的一种方法是在所有者将数据传递给提供者之前对其进行加密。然而，现在数据所有者似乎很难搜索和查询数据库（如果不从第三方下载，因此使外包的整个动机失效）。理论上我们知道更安全的技术。也就是说，我们可以在不需要执行解密的情况下对加密数据进行计算。有许多方法可以解决这个问题，从完全同态加密到多方计算。事实上，在过去的几年里，这些领域取得了惊人的进步。该项目旨在采用这些理论方法，并更仔细地检查真正的实用性障碍。这将使用理论和实践专业知识的结合来完成，这是布里斯托尔密码学小组所独有的。