Digital rights management (DRM) encryption and...

Details Digital rights management (DRM) encryption and... Digital rights management (DRM) encryption and...

2006-12-19

2006-12-19

Barrón, Jr., Gilberto (Department: 2137)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C380S200000

Reexamination Certificate

active

07152166

ABSTRACT:
To render content on a medium, a device obtains a table from the medium, obtains a private key of the device (PR-PD), indexes into an entry of the table based thereon, obtains (PU-PD(RND)) from the indexed-into entry of the table, and applies (PR-PD) to (PU-PD(RND)) to expose a random key (RND). Then, the device obtains (RND(PR-PM)) from the table, applies (RND) to (RND(PR-PM)) to expose a private key of the medium (PR-PM), obtains (PU-PM(KD)) from the license, applies (PR-PM) to (PU-PM(KD)) to expose a content key (KD), obtains (KD(content)) from the storage medium, applies (KD) to (KD(content)) to expose the content.

REFERENCES:
patent: 5715403 (1998-02-01), Stefik
patent: 6002772 (1999-12-01), Saito
patent: 6550011 (2003-04-01), Sims, III
patent: 2002/0013772 (2002-01-01), Peinado
patent: 2002/0136407 (2002-09-01), Denning et al.
patent: 2002/0152393 (2002-10-01), Thoma et al.
patent: 2002/0161997 (2002-10-01), Yamasaki et al.
patent: 2003/0140227 (2003-07-01), Asano et al.
patent: WO 00/58811 (2000-10-01), None
patent: WO 00/59150 (2000-10-01), None
patent: WO 01/52021 (2001-07-01), None
Griswold, G.N. “A Method for Protecting Copyright on Networks”,Infologic,1-11.
Kahn, R.E. “Deposit, Registration and Recordation in an Electronic Copyright Management System”,ARL,Jul. 3, 2002, 6 pages.
Molotkov, S.N. et al., “On the key generation for N users in quantum cryptography”,JETP Letters,1995, 62(12), 959-964.
Rivest, R.L. “The RC5 encryption algorithm”,Dr. Dobb's Journal,1995, 20(1), 146-148.
Wheeler, D.J. “A bulk data encryption algorithm”,Cambridge Security Workshop. Fast Software Encryption,Dec. 9-11, 1993, Publication Date 1994, 127-134, INSPEC Abstract No. C9502-6130S-023.
U.S. Appl. No. 09/892,371, filed Jun. 27, 2001, Peinado.

Affiliated with

Also associated with

Rating

Digital rights management (DRM) encryption and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital rights management (DRM) encryption and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital rights management (DRM) encryption and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3672923