CAJ | 학술논문

认证码用于解决信息传输中的认证问题。在信息传输中除了发方和收方外，还有赦方可能进行模仿攻击或替换攻击．此认证码是利用辛几何构作的一类non-Cartesian认证码，并计算了信源个数、编码规则个数以及信息个数；当编码规则按等概率分布选取时，求出了模仿攻击成功的概率和替换攻击成功的概率．
인증마용우해결신식전수중적인증문제。재신식전수중제료발방화수방외，환유사방가능진행모방공격혹체환공격．차인증마시이용신궤하구작적일류non-Cartesian인증마，병계산료신원개수、편마규칙개수이급신식개수；당편마규칙안등개솔분포선취시，구출료모방공격성공적개솔화체환공격성공적개솔．
Authentlcation codes are used in communication channels. Besides the transmitter and the receiver there is an opponent who may play either the impersonation attack or the substitution attack in the information transformation. A construction of non - Cartesian authentication code from symplectic geometry is given in this paper. The cardinals ｜ S ｜、｜ E ｜、｜ M ｜ are computed. Assuming that the encoding rules are chosen according to a uniform probability distribution, the probabilities of successful impersonation attack and of successful substitution sttack the code are computed.