Command authentication process

Details Command authentication process Command authentication process

H - Electricity

04

L

H04L 9/32 (2006.01) H04B 7/185 (2006.01) H04L 29/06 (2006.01)

Patent

CA 2077834

COMMAND AUTHENTICATION PROCESS Abstract of the Disclosure A slave station, such as an orbiting satellite, and a master station, such as a ground control station, have their own lists of random pads. The master and slave station lists are identical. When the master station sends a critical command to the slave station, a selected one of the pads is combined with the command and transmitted to the slave station as a data communication message. Each pad is used only once. The slave station evaluates the received pad value using its version of the same selected pad. If the evaluation detects correspondence, then the command is authenticated and the slave station acts upon the command. The random pads are generated by the slave station. They are encrypted using an asymmetric encryption process and transmitted to the master station so that the master and slave stations will operate on common sets of pads.

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