| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of implementing a state tracking mechanism in a communications session between a server (1) and a client system (2). SOLUTION: In the course of the communications session, application data are provided to the client system (2) in accessible form only when the client system (2) has a valid value of state tracking information. The method includes: transmitting a message carrying a new value of the state tracking information to the client system (2); and calculating the value of the state tracking information valid after transmission of the message using as input at least the new value carried in the message and a datum maintained at the client system (2). COPYRIGHT: (C)2008,JPO&INPIT |
