机构地区: 西安电子科技大学通信工程学院信息保密研究所
出 处: 《西安电子科技大学学报》 1999年第4期411-415,共5页
摘 要: 认证码与UHash函数有密切关系,尤其利用ε-ASUHash函数族构造认证码是一个重要手段.通过有限域上迹函数构造了两个新的ε-ASUHash函数族,同时得到相应的Cartesian认证码.与现有其他认证码参数比较,所得码效率更高。 The authentication code is in close relationship with universal Hash functions. Particularly, it is an important technique to construct the authentication code by using families of ε ASU Hash functions. In this paper two new families of ε ASU Hash functions are constructed using the trace function over finite fields, and two Cartesian authentication codes (A code) are consequentially obtained. Compared with the previously best known A code, our code is efficient and can authenticate more source states bits with the same key bits.