强安全可调加密方案的两个密码特性

Two Cryptographic Properties of Strong Security Tweakable Enciphering Scheme

该文在同时具备选择明文攻击和选择密文攻击的条件下,给出了可调加密方案的分类攻击安全和广义分类攻击安全的概念,并证明了二者的等价性;证明了抗基本区分攻击安全和抗左右不可区分攻击安全的可调加密方案一定是分类攻击安全和广义分类攻击安全的,从而揭示了强安全可调加密方案一定具有分类攻击安全和广义分类攻击安全这两个密码特性。

This paper presents the concepts of sorted-attack security and generalized sorted-attack security of tweakable enciphering schemes under chosen-plaintext and chosen-ciphertext attacks.Firstly,it is proved that those two notions are equivalence.Secondly,it is proved that the basic distinguishing attack security and the left-or-right distinguishing attack security guarantee sorted-attack security and generalized sorted-attack security,therefore reveals that a strong tweakable enciphering scheme have those two cryptographic properties.