Protection system for intelligent cards
Hardware assist for protecting PC software
Video control system having session encryption key
Information processing apparatus with replaceable security element
Intelligent diskette for software protection
Protection against unauthorized use of software recorded on recording medium
Electronic data protection system
CD-ROM with machine-readable I.D. code
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Cable television converter box with a smart card connector underneath
ApplicationNo. 880203 filed on 06/23/1997
US Classes:380/203, Having copy protect signal340/5.74, Access to electrical information340/5.86, Document authentication360/60, Recording-or erasing-prevention705/57Copy protection or prevention
ExaminersPrimary: Tarcza, Thomas H.
Assistant: Sayadian, Hrayr A.
Attorney, Agent or Firm
Foreign Patent References
International ClassesH04L 009/00
AbstractA video disc designed for providing security and tracking data in the rental video media market. Those new formats for video players and media allow for inclusion of security features which both allow tracking of rental of such media and prevent unauthorized rental thereof Each player includes a decision circuit which plays a particular optical disc only if a player identification number recorded on a special separate magnetic track on the optical disk is the same as the player identification stored in the player, and if a movie identification number optically read from the disc matches a movie identification number recorded on the special separate magnetic track. A corresponding apparatus is provided at the video rental store which, at the time of rental, records on a magnetic portion of the media in encrypted form the movie identification number and the number of the particular disc player for which that rental is intended. The authorization encryption uses the private key of a public key system, the public key and the modulus being pre-recorded on the optical portion of the disc.