| 摘要 |
PROBLEM TO BE SOLVED: To securely prevent access from a hacker's machine. SOLUTION: An authorization session key is generated on an authorized machine according to the CPU identification number, hardware constitution, and time stamp of the machine. An authorization machine retrieves the same information as to the authorized machine and generates a session lock which is effective in a specific time interval. When a session key to join matches one of session locks and is not in a list of used keys, the session key is added to the list of used keys and the access is allowed. Thus, a one-time use key is used. The lock and key can be generated between time stamps, so a user requests services plural times from the same machine without waiting for a prescribed time between requests, and a front end for a masquerade protection tool can write retrial until access is successful. |
