| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an authentication system which prevents the leakage of shared information without requiring enormous cost. <P>SOLUTION: The authentication system is provided with: a storage means wherein shared information utilized by a plurality of users including a user is stored; an authentication means which authenticates whether service which the individual user utilizes is available or not; and a permission means which permits access to the storage means on the basis of the authentication result of the authentication means. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
