Reception apparatus for authenticated access to coded broadcast signals

  • US 6,473,742 B1
  • Filed: 03/25/1998
  • Issued: 10/29/2002
  • Est. Priority Date: 02/16/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. Apparatus for receiving broadcast transmissions, which transmissions contain identifiers identifying the origin of the transmission, the apparatus including:

  • a store for storing data identifying transmissions which the apparatus is or is not permitted to receive;

    means for loading the store with such data; and

    means for comparing received identifiers with the contents of the store and to enable or disable reception in dependence on the result of the comparison;

    wherein the apparatus has a fixed part and a removable part;

    wherein the removable part contains a further store containing the said data;

    the loading means being operable to transfer the contents of the further store into the first-mentioned store; and

    wherein each of the fixed and removable parts has means storing a verification number (X) and the loading means is operable to perform the transfer only after a verification step indicating that the verification numbers tally.

View all claims

    Thank you for your feedback