Information security – Prevention of unauthorized use of data including prevention...
Reissue Patent
2011-02-01
2011-02-01
Pich, Ponnoreay (Department: 2435)
Information security
Prevention of unauthorized use of data including prevention...
C726S027000, C705S050000, C705S051000, C713S189000, C713S193000, C380S200000, C380S201000, C380S237000
Reissue Patent
active
RE042106
ABSTRACT:
A digital data file encryption system and method where digital data encrypted to a high level and an encryption key are received and stored in a computer. The stored, encrypted digital data is decrypted on the basis of the encryption key and stored in a buffer of a predetermined size. Output digital data from the buffer is reencrypted to a low level of encryption and downloaded to a digital data playing device or a data storage medium. Therefore, a digital audio or video data file is prevented from being diverted in unencrypted form from a computer communication network when it is transmitted to a personal computer through the computer communication network and, in turn, downloaded to the digital data playing device. Further, the digital data playing device is prevented from rising in cost due to the use of simple encryption for data downloaded to the playing device.
REFERENCES:
patent: 4907275 (1990-03-01), Hashimoto
patent: 5323464 (1994-06-01), Elander et al.
patent: 5539827 (1996-07-01), Liu
patent: 5659618 (1997-08-01), Takahashi et al.
patent: 5867579 (1999-02-01), Saito et al.
patent: 5889860 (1999-03-01), Eller et al.
patent: 5917915 (1999-06-01), Hirose et al.
patent: 5991399 (1999-11-01), Graunke et al.
patent: 5999622 (1999-12-01), Yasukawa et al.
patent: 6003135 (1999-12-01), Bialick et al.
patent: 6021199 (2000-02-01), Ishibashi et al.
patent: 6170060 (2001-01-01), Mott et al.
patent: 6289454 (2001-09-01), Eslinger et al.
patent: 6330675 (2001-12-01), Wiser et al.
patent: 6367019 (2002-04-01), Ansell et al.
patent: 6385596 (2002-05-01), Wiser et al.
patent: 6389534 (2002-05-01), Elgamal et al.
patent: 6577735 (2003-06-01), Bharat
patent: 6751321 (2004-06-01), Kato et al.
patent: 6950941 (2005-09-01), Lee et al.
patent: 2001/0016836 (2001-08-01), Boccon-Gibod et al.
patent: 2001/0042043 (2001-11-01), Shear et al.
patent: 2002/0077984 (2002-06-01), Ireton
patent: 2005/0021477 (2005-01-01), Krishnan et al.
patent: 1205479 (1999-01-01), None
patent: 01-246979 (1989-10-01), None
patent: 04-302595 (1992-10-01), None
patent: 06-189262 (1994-07-01), None
patent: 06-326882 (1994-11-01), None
patent: 07-295892 (1995-11-01), None
patent: 07-297951 (1995-11-01), None
patent: 08-006879 (1996-01-01), None
patent: 08-055164 (1996-02-01), None
patent: 08-069419 (1996-03-01), None
patent: 08-077706 (1996-03-01), None
patent: 08-107412 (1996-04-01), None
patent: 08-125651 (1996-05-01), None
patent: 08-130516 (1996-05-01), None
patent: 10-013784 (1998-01-01), None
patent: 10-013808 (1998-01-01), None
patent: 10-178421 (1998-06-01), None
patent: 1997-0057968 (1997-07-01), None
patent: 1998-081704 (1998-11-01), None
patent: WO 00/27067 (2000-05-01), None
Lacy et al, “Music on the Internet and the Intellectual Property Protection Problem”, pp. SS77-SS83, published: 1997.
Business Wire, “J-Bird Records Becomes First Label to Launch a C0-Branded Download Station with AT&T's a 2b music; Site Allows sampling and Purchase of CD-quality Downloads”, Business Wire, New York: Jan. 19, 1999.
Cha Ghun-Up
Jung Han
Kang Myeong-Joon
Birch & Stewart Kolasch & Birch, LLP
LG Electronics Inc.
Pich Ponnoreay
LandOfFree
Digital data file encryption apparatus and method 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 data file encryption apparatus and method and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital data file encryption apparatus and method and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2628453