Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Security kernel or utility
Reexamination Certificate
2011-07-26
2011-07-26
El Hady, Nabil M (Department: 2434)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Security kernel or utility
C726S031000, C726S032000
Reexamination Certificate
active
07987361
ABSTRACT:
A method of and an apparatus for copying and decrypting encrypted digital data. The method of copying encrypted digital data includes encrypting a first media key block to be used for decryption of the encrypted digital data using a predetermined key of a second information storage medium and storing the encrypted digital data and the encrypted first media key block in the second information storage medium. Security of data encryption is heightened by not discarding an encryption key used for an initial encryption, encrypting the encryption key used for initial encryption using another encryption key used for a second encryption, and storing the encrypted encryption key with the data. Also, since unnecessary decryption and encryption of data are not repeated, the time required for copying data is reduced, and since data is transferred between apparatuses in an encrypted state, a security level is higher.
REFERENCES:
patent: 5457746 (1995-10-01), Dolphin
patent: 5661799 (1997-08-01), Nagel et al.
patent: 5784464 (1998-07-01), Akiyama et al.
patent: 5857021 (1999-01-01), Kataoka et al.
patent: 6044155 (2000-03-01), Thomlinson et al.
patent: 6061451 (2000-05-01), Muratani et al.
patent: 6106396 (2000-08-01), Alcorn et al.
patent: 6367019 (2002-04-01), Ansell et al.
patent: 6609116 (2003-08-01), Lotspiech
patent: 2002/0176575 (2002-11-01), Qawami et al.
patent: 2003/0081792 (2003-05-01), Nakano et al.
patent: 2003-204320 (2003-07-01), None
patent: 2001-0078491 (2001-08-01), None
patent: 2003-0014638 (2003-02-01), None
patent: WO 02/067548 (2002-08-01), None
Choi Yang-lim
Han Hee-chul
Han Sung-hyu
Kim Yun-sang
You Yong-kuk
El Hady Nabil M
Harriman Dant B Shaifer
Mion, PLLC Sughrue
Samsung Electronics Co,. Ltd.
LandOfFree
Method of copying and decrypting encrypted digital data 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 Method of copying and decrypting encrypted digital data and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of copying and decrypting encrypted digital data and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2642945