×

Video media security and tracking system

  • US 5,754,648 A
  • Filed: 06/20/1997
  • Issued: 05/19/1998
  • Est. Priority Date: 05/12/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for authorized playing of a prerecorded medium on a player, the prerecorded medium having a contents portion including prerecorded program contents, a medium program identification, and a decryption key, the method comprising the steps of:

  • reading from the contents portion the medium program identification and the decryption key;

    reading from an authorization medium an encrypted program identification and a player identification recorded on the authorization medium;

    using the decryption key to decrypt the program identification and the player identification read from the authorization medium;

    comparing the decrypted program identification and player identification to respectively a player identification stored in the player and to the medium program identification read from the contents portion; and

    if both comparisons indicate a match, enabling operation of the player to play the prerecorded medium.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×