US 6,983,364 B2
System and method for restoring a secured terminal to default status
Dominique Gougeon, Rocklin, Calif. (US)
Assigned to Hewlett-Packard Development Company, LP., Houston, Tex. (US)
Filed on Jun. 29, 2001, as Appl. No. 9/893,479.
Prior Publication US 2003/0005294 A1, Jan. 02, 2003
Int. Cl. G06F 9/00 (2006.01)
U.S. Cl. 713—2 16 Claims
OG exemplary drawing
 
1. A system for restoring a terminal having a display to a default condition when a clear file is downloaded to the terminal, comprising:
a random number generator included in the terminal; and
a file authentication arrangement for authenticating a clear file that is downloaded to the terminal from outside the terminal.
wherein said terminal is arranged to execute a clear instruction in said clear file upon authentication of said clear file.
wherein said clear file includes a random number generated by said random number generator and displayed on said display so that the random number can be placed into the clear file before being downloaded to the terminal, and
wherein said random number is changed each time said terminal is restored to a default condition so as to prevent replay attacks resulting from copying of the clear file.