Device for reproducing data

Details Device for reproducing data Device for reproducing data

2005-05-24

2005-05-24

Cangialosi, Salvatore (Department: 3621)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C705S059000

Reexamination Certificate

active

06898708

ABSTRACT:
A cellular phone (100) stores encrypted content data and encrypted license key distributed thereto in a memory card (110). The cellular phone (100) and the memory card (110) collectively perform a part of mutual authentication processing upon power-on. The encrypted license key (Kc) read from the memory card (110) is decrypted by a first decryption processing portion (1510) with a session key (Ks4), and is further decrypted by a second decryption processing portion (1514) with a system symmetric key (Kcom) for extraction. A third encryption processing portion (1516) decrypts the encrypted content data read from memory card (110) with the license key (Kc) to reproduce content data (Data).

REFERENCES:
patent: 5557765 (1996-09-01), Lipner et al.
patent: 5745573 (1998-04-01), Lipner et al.
patent: 5956403 (1999-09-01), Lipner et al.
patent: 5991406 (1999-11-01), Lipner et al.
patent: 6256391 (2001-07-01), Ishiguro et al.
patent: 6360320 (2002-03-01), Ishiguro et al.
patent: 6683956 (2004-01-01), Aikawa et al.
patent: 6697945 (2004-02-01), Ishiguro et al.
patent: 000966127 (1999-12-01), None
patent: 001150196 (2001-10-01), None
patent: 5-75598 (1993-03-01), None
patent: 10-40172 (1998-02-01), None
patent: 11-154944 (1999-06-01), None
patent: 11-265317 (1999-09-01), None
patent: 11-306673 (1999-11-01), None
“A Taxonomy for key escrow encryption systems”, Denning et al, Communications of the ACM, v39n3, pp. 34-39(Mar. 1996).*
“intel and RSA to accelerate delivery of new PC and application security products”, M2 Presswire, (Jan. 18, 1999).*
K. Yamanaka et al.; NTT R&D, vol. 44, No. 9, pp. 813-818, 1995. See PCT search report.
S. Kotani et al.; vol. 49, No. 3, May 1998. See PCT search report.
Partial translation of Ango Riron Nyumon.

Affiliated with

Also associated with

Rating

Device for reproducing data does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for reproducing data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for reproducing data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3367248