System and method for authenticating software carriers

Details System and method for authenticating software carriers System and method for authenticating software carriers

1993-10-29

1995-09-12

Barron, Jr., Gilberto

Cryptography

Cryptanalysis

380 5, 380 30, 360 60, G11B 2328, G11B 1504, H04L 930

Patent

active

054504899

ABSTRACT:
A disk player that will play only authorized disks. Predetermined data blocks, including those in the lead-in section of the disk which contain content-related data, are processed to derive an authorization code. The authorization code is stored on the disk in encrypted form, using the private key of a public-key cryptosystem pair. The player processes the same disk data to derive a computed code; the player also uses the paired public key to decrypt the encrypted authorization code on the disk. Play of the disk ensues only if the decrypted authorization code matches the computed code. The same technique can be used to control not play of the disk as a whole, but play in certain specific modes.

REFERENCES:
patent: 4577289 (1986-03-01), Comerford et al.
patent: 4670857 (1987-06-01), Rackmun
patent: 4709367 (1987-11-01), Grafe et al.
patent: 5214696 (1993-05-01), Keiser, II et al.

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