Security arrangement for downloadable cable television...

Details Security arrangement for downloadable cable television... Security arrangement for downloadable cable television...

H - Electricity

04

N

350/27

H04N 7/167 (2006.01) H04L 9/00 (2006.01) H04N 7/16 (2006.01)

Patent

CA 1268247

ABSTRACT A method and apparatus prevent unauthorized programming viewing via a downloadable cable television converter. A booter checksum is computed from data contained in a downloaded booter image. A valid checksum is extracted from tag data associated with a scrambled program signal transmitted on the cable system. The booter checksum is compared to the extracted valid checksum. If the booter checksum and valid checksums match, a descrambler is enabled to descramble the scrambled program signal. If the checksums do not match, the descrambler is not enabled. In this manner, a pirate is prevented from downloading a false booter image to defeat the integrity of the converter.

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