基于密文的安全多方计算研究

项目名称： 基于密文的安全多方计算研究

项目编号： No.61272436

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 自动化技术、计算机技术

项目作者： 杨波

作者单位： 陕西师范大学

项目金额： 80万元

中文摘要： 在传统的安全多方计算协议中，参与计算的用户其数据是以明文的形式存储在私有存储设备。在诸如云计算等共享存储平台的应用中，用户为了自己数据的安全，更愿意以密文的方式将数据存储在共享存储平台。在这种应用环境下，传统的安全多方计算协议面临许多新的挑战。基于共享存储平台，研究基于密文的安全多方计算协议，成为急需解决的问题。 本项目的研究内容包括：安全高效的全同态加密体制、具有机密性和隐私性的密文搜索协议、基于密文的可搜索的公钥加密体制、多备份的密文拥有证明、基于密文的代理安全多方计算协议。 项目的研究不仅可有效解决网络共享存储带来的安全问题，还可提供一些比传统协议更为高效的安全多方计算协议，选题具有重要的理论意义和实用价值。

中文关键词： 安全计算；可证安全性；共享存储平台；云计算；移动互联网

英文摘要： In traditional secure multiparty computation protocols (SMCP), the participants' data are stored in plaintext in their own private storage devices. In shared storage platforms such as the public clouds, the participants would like to store their own data in ciphertext rather than plaintext concerning the data security. Some new challenges arise now since traditional SMCP cannot be applied to these applications directly. Therefore, the research on SMCP based on ciphertext in the shared storage platforms becomes urgent. This project studies ciphertext-based SMCP, which includes secure and efficient fully homomorphic encryption schemes, ciphertext-based search protocols with confidentiality and privacy preserving, ciphertext-based searchable public key encryption schemes, multi-copy provable data possession, ciphertext-based proxy secure multiparty computation protocols. The fruits of the proposed research will not only help to address the security issues in shared storage platforms, but also offer some more efficient secure multiparty computation protocols than traditional ones. Thus, the research of the project is of great importance both in theory and practice.

英文关键词： secure computation；provable security；shared storage platform；cloud computing；mobile internet