A method of and an apparatus for copying and decrypting encrypted digital data. The method of copying encrypted digital data includes encrypting a first media key block to be used for decryption of the encrypted digital data using a predetermined key of a second information storage medium and storing...http://www.google.com/patents/US20050108560?utm_source=gb-gplus-sharePatent US20050108560 - Method of copying and decrypting encrypted digital data and apparatus therefor
