机构地区: 陕西师范大学数学与信息科学学院数学系
出 处: 《陕西师大学报(自然科学版)》 1998年第4期21-24,共4页
摘 要: 通过有限域上迹函数构造了两个新的Cartesian认证码,计算了码参数,并在密钥均匀分布情况下计算了敌方假冒和敌方替代成功的概率.与其它现有认证码参数比较,所得码效率更高,在同等欺诈概率条件下能以同等长度密钥认证较多比特信源状态. Two new constructions of Cartesian authentication codes are proposed from the trace functions over finite fields.Their parameters are derived,and the probabilities of success for the impersonation attack and the substitution attack by the opponent are also computed in the case of assuming that the keys are uniformly distributed.Compared with the previously best known A code ,our codes are efficient and can authenticate more source states bits with the same longth of keys.