利用有限伪辛几何构造笛卡尔认证码

利用有限域上的伪辛几何构造了两类笛卡尔认证码，并且计算了它们的参数，假设编码规则是按照一种均匀概率分布选择，则假冒攻击成功的概率Ｐ１和替换攻击成功的概率ＰＳ也被计算。

Construction of Cartesian Authentication Codes from Pseudo Symplectic Geometry

In this paper two classes of Cartesian authentication codes are constructed from geometry of pseudo symplectic group over finite fields of even characteristic,and their size parameters are computed. Assuming that the encoding rules are chosen according to a uniform probability distribution,the probabilities PI and PS of a successeful impersonation attack and a successeful substitution attack,respectively,of these codes are also computed.