Cryptography – Communication system using cryptography – Symmetric key cryptography
Reexamination Certificate
2009-07-06
2009-12-29
Moise, Emmanuel (Department: 2437)
Cryptography
Communication system using cryptography
Symmetric key cryptography
Reexamination Certificate
active
07639811
ABSTRACT:
The invention is directed to a source device and a method for encrypting digital contents at the source device. According to an embodiment, the method includes performing a first addition operation by using a first source internal key and an identifier (ID), the first source internal key being associated with the source device, the ID being associated with at least one of a target device and a storage medium of the target device, and the target device being connected to the source device; generating a source encryption key based on an output of the first addition operation and a second source internal key by using a predetermined encryption algorithm, wherein the second source internal key is associated with the source device; encrypting the digital content using the source encryption key; and transmitting the encrypted digital content without the source encryption key to the target device.
REFERENCES:
patent: 4797672 (1989-01-01), Kousa
patent: 5673316 (1997-09-01), Auerbach et al.
patent: 5784464 (1998-07-01), Akiyama et al.
patent: 5933498 (1999-08-01), Schneck et al.
patent: 6094487 (2000-07-01), Butler et al.
patent: 6868404 (2005-03-01), Ono et al.
patent: 7058819 (2006-06-01), okaue
patent: 2001/0016836 (2001-08-01), Boccon-Gibod et al.
patent: 2002/0059363 (2002-05-01), Katz et al.
patent: 2002/0083319 (2002-06-01), Ishiguro et al.
patent: 1202658 (1998-12-01), None
patent: 0874300 (1998-10-01), None
patent: 0874300 (1998-10-01), None
patent: 8-69419 (1996-03-01), None
patent: 10-191036 (1998-07-01), None
patent: 10-260902 (1998-09-01), None
patent: 10-1998-0081704 (1998-11-01), None
patent: 10-1998-0083221 (1998-12-01), None
patent: WO-01/93002 (2001-12-01), None
T. Yamamoto et al., Technical Report of IEICE; ISEC 93-29, vol. 93, No. 208, (1993), pp. 65-75.
Menezes, Alfred, J et al. “Handbook of Applied Cryptography” (c) 1997 CRC Press. pp. 568-570.
Cho Young-Soon
Jung Han
Kang Myeong-Joon
Kim Jae-Young
Birch & Stewart Kolasch & Birch, LLP
LG Electronics Inc.
Moise Emmanuel
Pearson David J
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