认证加密算法的安全性分析研究

项目名称： 认证加密算法的安全性分析研究

项目编号： No.61472250

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 自动化技术、计算机技术

项目作者： 谷大武

作者单位： 上海交通大学

项目金额： 82万元

中文摘要： 保密性和完整性是数据安全的核心内容，大量的信息安全应用往往要求这两个安全特性同时具备，学术上把同时提供保密性和完整性功能的密码算法称为认证加密(AE)算法。人们一般采用对称加密+消息认证的组合方式来构造AE方案，但效率不高甚至存在安全问题，使得人们难以构造一个具有普适应用的AE方案。2012年7月，美国NIST发起了征集AE算法的CAESAR竞赛活动，标志着AE的安全性分析将成为国际密码领域新的研究热点。本项目拟对AE算法结构提出新的安全性分析思想和技术；从数学分析和物理分析等多个角度发现和揭示几种典型AE方案的安全强度；参与CAESAR候选算法的安全性评估，提出有理论或实际意义的安全性分析结果。本项研究将丰富和完善AE算法的分析和设计方法，为我国自主算法的深入分析论证提供研究积累和人才储备，不仅能促进国际上新一轮AE算法的标准化工作，也为将来把我国自主算法推向世界标准做好学术和技术准备。

中文关键词： 认证加密；密码分析；密码算法；分组密码；流密码

英文摘要： Privacy and integrity, the core of data security, are usually both required in many applications of information security. With integration of these two characteristics, an algorithm is called Authenticated Encryption (AE). The combination of symmetric encryption and message authentication is often applied in building an AE scheme, but it is of low efficiency and even potential security problems. Therefore, it is almost impossible to build a pervasive AE scheme. In July 2012, the NIST of USA sponsored the CAESAR competition for selecting AE standards during candidates of AE schemes, which meant that security analysis of AE schemes has become a hot issue in international cryptologic research society. This project aims at raising new ideas and technologies of security analysis on the structures of AE algorithm, finding security strength of several typical AE schemes from the angles of mathematical analysis and physical analysis, participating security evaluation on candidates of AE schemes in CAESAR and proposing security analysis results in theory or practice. This research will enrich and improve the analysis and design of available AE schemes, and contribute our research results and young talents for potential deep analysis of possible AE schemes of China in the future. This will not only promote the standardization of AE algorithm, but also make theoretical and technical preparation for our national self-reliant algorithm to reach the international standard.

英文关键词： Authenticated Encryption;Cryptanalysis;Crypto Algorithms;Block Cipher;Stream Cipher