System and method for access data control

Details System and method for access data control System and method for access data control

1995-06-07

1997-12-30

Barron, Jr., Gilberto

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 4, H04L 932

Patent

active

057039518

ABSTRACT:
The system and method of the present invention provides the support of high density removable media, such as CD-ROM or MO, to be used as a distributed media for storing data where access thereto is securely restricted. Through this system and method, the secure periodic distribution of several different sets of data information to the end user is achieved with access control selectively performed by at the user's site through communication with the billing/access center. User billing is based on the purchase of the decryption access codes as indicated by the access code attributes encoded on the media. Access code availability is further controlled by selectively providing for updates of decryption access codes.

REFERENCES:
patent: 4827508 (1989-05-01), Shear
patent: 4888798 (1989-12-01), Earnest
patent: 4977594 (1990-12-01), Shear
patent: 5050213 (1991-09-01), Shear
patent: 5058162 (1991-10-01), Stanten et al.
patent: 5101571 (1992-04-01), Katznelson
patent: 5191611 (1993-03-01), Lang

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