Patent · US Active

Secure pre-recorded digital medium

US8229857B2 · kind B2 · utility

2Cited by
3References
4Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 10, 2006
Grant dateJul 24, 2012
Priority date—
Expiry dateJan 11, 2028

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG11B20/00253
  • WIPO fieldAudio-visual technology
  • WIPO sectorElectrical engineering

Abstract

A secure pre-recorded medium and a method for descrambling encrypted content thereon. When a player wants to access the content, a secure processor on the medium verifies that the player has not been revoked, preferably by comparing an identity of the player with identities in a revocation list, after which a mutual authentication is performed. The secure processor then verifies that the player has the rights to access the content and provides the player with the key necessary to descramble the content, whereafter the player descrambles the content.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.