Data processor having BIOS decryption of emulated media images

Details Data processor having BIOS decryption of emulated media images Data processor having BIOS decryption of emulated media images

1994-09-27

1997-07-29

Teska, Kevin J.

Cryptography

Key management

Having particular key generator

395701, 380 4, 380 28, G06F 9455, H04L 900

Patent

active

056528680

ABSTRACT:
Multiple applications or versions of an application in different languages are distributed on a single mass storage medium, such as a CD-ROM. The BIOS is programmed to emulate different drives individually or simultaneously with data read from prescribed regions of the CD-ROM. To prevent access to unauthorized emulated images, each image is provided with an encryption key used as the seed to a pseudorandom number generator. Pseudorandom decryption of each block of data read from the CD-ROM is performed at the BIOS level only or at both the BIOS and application levels. For enhanced security, the algorithm decrypts each block of encrypted image data at a starting index that is pseudorandomly derived.

REFERENCES:
patent: 4780905 (1988-10-01), Cruts et al.
patent: 5003597 (1991-03-01), Merkle
patent: 5128995 (1992-07-01), Arnold et al.
patent: 5193174 (1993-03-01), Bealkowski et al.
patent: 5210875 (1993-05-01), Bealkowski et al.
patent: 5230052 (1993-07-01), Dayan et al.
patent: 5375169 (1994-12-01), Seheidt et al.
patent: 5388156 (1995-02-01), Blackledge et al.
patent: 5388267 (1995-02-01), Chan et al.
patent: 5418918 (1995-05-01), Vander Kamp et al.
patent: 5432939 (1995-07-01), Blackledge et al.
patent: 5454039 (1995-09-01), Coppersmith et al.
patent: 5465357 (1995-11-01), Bealkowski et al.

Affiliated with

Also associated with

Rating

Data processor having BIOS decryption of emulated media images does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data processor having BIOS decryption of emulated media images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data processor having BIOS decryption of emulated media images will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-639994