摘要： 在一些安全协议中，需要同时认证一组数据，可以将其视为一个字符串向量。普通消息认证码的输入仅为单个字符串，针对该问题提出一个输入为字符串向量的消息认证码TLPMAC。TLPMAC是基于PMAC的变体，它模拟PMAC的结构。TLPMAC具有双层可并行性和可预处理性，能处理包含任意个分量的字符串向量且仅需一个密钥。将普通消息认证码的安全性定义扩展到输入为向量的情形，给出TLPMAC的安全性证明。

关键词: 消息认证码, 分组密码, 工作模式, 可证明安全性

Abstract: In some security protocols, a group of data should be authenticated together. They can be considered as a vector of character strings. An ordinary message authentication code only accepts a single character string as input. Aiming at this problem, this paper proposes a message authentication code TLPMAC, whose input is a vector of character strings. TLPMAC is based on a variant of PMAC and simulates the structure of PMAC. TLPMAC is two-level parallelizable, pre-processible, and can process a vector of character stings including any number of components while only using one key. It extends the security notions of ordinary message authentication codes to the vector-input scenario and proves the security of TLPMAC.

Key words: message authentication code, block cipher, working mode, provable security

中图分类号: 

• TP309