×

INFORMATION PROCESSING APPARATUS, AUTHENTICATION METHOD, AND STORAGE MEDIUM

  • US 20100017626A1
  • Filed: 07/16/2009
  • Published: 01/21/2010
  • Est. Priority Date: 07/18/2008
  • Status: Active Grant
First Claim
Patent Images

1. A storage medium comprising:

  • an encrypted content;

    key management information which is updated whenever necessary and includes a media key block including encrypted media keys obtained by encrypting a media key which is a base of an authentication key used for mutual authentication with another apparatus by using different device keys; and

    first and second application keys which encrypt the title keys for each application of the content and are alternately updated and encrypted when the key management information is updated.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×