利用伪辛几何构造新的带仲裁的认证码  

Construction of authentication codes with arbitration from pseudo-sympletic geometry

作　　者：余江明[1] 李志慧[2] 

机构地区：[1]空军工程大学训练部,陕西西安710051 [2]陕西师范大学数学与信息学院,陕西西安710062

出　　处：《西北大学学报（自然科学版）》2005年第1期7-10,共4页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(60174016)

摘　　要：目的　带仲裁的认证码(A2-码 )能解决通信系统中发方与收方互不信任的问题。方法　利用伪辛几何构造两类A2-码。结果　得到了两类新的A2-码,计算了码的参数,当编译码规划都按等概率分布选取时,计算出各种攻击成功的概率。结论　所得到的两类新的A2-码比前人得到的A2 码具有更好的抵抗模仿攻击的能力。Aim Authentication code with arbitration(A^2-code)can solve the problem of transmitter/reciver disputes in comunication system.Methods Two construction methods of A^2-code from pseudosympletic geometry are given. Two families of new A^2-codes are obtained.Results The parameters of the A^2-codes are computed, and assuming the rules of the transmitter and the receiver are chosen according to an equal probability distribution,the probabilityies of success for different type of deceptions are also computed.Conclusion Those two families of new A^2-codes are better than previously known codes in defence impersonation attacks.

关 键 词：认证码 仲裁人 伪辛几何 

分 类 号：O157.4[理学—数学]