| 摘要 |
<p>This invention relates to a method for introducing logical protective means comprising a collective key (K,Km) in a series of retrievable authentication tokens (310) each token including memory and processing means said protective logical means being common to said series of authentication tokens (310), said protective logical means comprising the collective key and comparing software means for comparing a key which is submitted to the token with the collective key so as to allow access to a predetermined content of the token when said submitted key corresponds to the memorized key, characterized in that said method for introducing the logical protective means includes two different steps a) and b), which consist in: a) introducing first protective logical means in the token which include a subpart (K1) of the collective key (Km) said first protective logical means being efficient for preventing access to said predetermined content, b) introducing complement protective logical means in the token which include a complement part (K2) of the collective key (Km) so that the protective logical means become able to perform a key comparing function allowing access to the said predetermined memory area when a submitted key corresponds to the collective key (Km).</p> |
