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| TAE模式的分析和改进 |
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王鹏1, 冯登国1,2
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1.信息安全国家重点实验室(中国科学院,研究生院),北京,100049;2.信息安全国家重点实验室(中国科学院,软件研究所),北京,100080
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| 摘要: |
| TAE(tweakable authenticated encryption)模式是一种基于可调分组密码的加密认证模式.研究结果表明,安全的可调分组密码不是安全的TAE模式的充分条件.只有当可调分组密码是强安全的时候,TAE模式才是安全的.同时,还给出了TAE模式的一些改进,得到模式MTAE(modifiedtweakable authenticated encryption),并且证明了其安全性. |
| 关键词: 加密认证 分组密码 TAE模式 可调分组密码 |
| DOI： |
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| 基金项目:Supported by the National Natural Science Foundation of China under Grant No.60273027 (国家自然科学基金); the National Grand Fundamental Research 973 Program of China under Grant No. G1999035802 (国家重点基础研究发展规划(973)); the National Outstanding Young Scientists Foundation of China under Grant No.60025205 (国家杰出青年科学基金) |
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| Cryptanalysis of the TAE Mode and Its Improvement |
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WANG Peng,FENG Deng-Guo
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| Abstract: |
| The TAE (tweakable authenticated encryption) mode is an authenticated encryption mode which is based on a tweakable block cipher. Previous research results show that the secure tweakable block cipher is not sufficient for the security of the authenticated encryption TAE mode. Only when the tweakable block cipher is strong will the TAE be secure. Some improvements to the TAE mode are also given in this paper, resulting in a MTAE (modified tweakable authenticated encryption) mode with security proof. |
| Key words: authenticated encryption block cipher TAE (tweakable authenticated encryption) mode tweakable block cipher |
