Fixed client identification system for positive...

Details Fixed client identification system for positive... Fixed client identification system for positive...

2003-10-23

2009-02-03

Chen, Shin-Hon (Department: 2131)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Security kernel or utility

C713S165000, C713S170000, C713S187000, C713S190000, C726S002000, C726S003000, C726S005000, C726S006000, C726S018000, C726S026000, C380S255000, C380S278000

Reexamination Certificate

active

07487350

ABSTRACT:
A tamperproof ClientID system to uniquely identify a client machine is invoked upon connection of a client application to a backend. Upon initial connection, the backend issues a unique ClientID containing a checksum. The client-application prepares at least two different scrambled versions of the ClientID and stores them in respective predetermined locations on the client machine. Upon subsequent connection to the backend, the client application retrieves and unscrambles the values at the two locations, verifies the checksums and compares the values. If the checksums are both correct and the values match, the ClientID value is sent to the backend, otherwise the client application sends an error code.

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