Software usage authorization system with key for decrypting/re-encrypting/re-transmitting moving target security codes from protected software
Method and apparatus for retrieving secure information from mass storage media
Method for retrieving secure information from a database
Method and apparatus for retrieving selected information from a secure information source
Method and apparatus for copy protection for various recording media using a video finger print
Video media security and tracking system
Optical disc for a master key, and a method and apparatus for optical-disc information management which inhibit and permit reproduction of main information from an illegal copy disc by using physical and logical security information Patent #: 5809545
ApplicationNo. 850535 filed on 05/02/1997
US Classes:705/57, Copy protection or prevention360/60, Recording-or erasing-prevention380/203, Having copy protect signal380/270Wireless communication
ExaminersPrimary: Stamber, Eric W.
Assistant: Coddington, Trevor Quick
Attorney, Agent or Firm
Foreign Patent References
International ClassG11B 23//28
AbstractThe invention consists of attaching or embedding a "TIRIS" transponder (or other RF or IR or barcode or other identifying device) physically into the center of the proposed DVD disk. Within the memory of the transponder, both a predetermined address and a code word are preprogrammed into the transponder at the manufacturing level of the media product. The media player not only comprises functionality to play the disk, but also comprises the functionality to transmit an interrogation signal to the transponder, and then to receive the transponder response signal. Therefore, once a disk is input to a media player, the interrogation portion of the media player transmits an interrogation signal to the transponder located on the disk. Thus once empowered with the interrogation signal, the transponder accesses the predetermined address and the code word from it's memory. Then the transponder transmits both the address and the code word to the interrogator, located within the media player, and the player accesses the particular address location on the disk. The media player only plays if there is a match between the read data-word and received code word. The comparison can occur within the interrogation portion of the media player or within the media player itself.