Secured electronic information delivery system having a three-ti

Cryptography – Cryptanalysis

Patent

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Details

380 25, 380 21, H04L 900

Patent

active

057844607

ABSTRACT:
A system is provided for retrieving a selected one of a plurality of encrypted software products stored in at least one storage device, such as a CD-ROM. Each software product is decryptable by a unique decryption key. The CD-ROM storage device is coupled to a end-user station having a unique serial number and a processor that is responsive to an application program stored therein. The user can select a software product to decrypt upon receipt of the corresponding decryption key. A remote vender station, having a unique password, is selectively coupled to the end-user station, via a network, to receive a request for the decryption key corresponding to the selected software product. Further, the vender station receives the serial number from the end-user station. A remote server is connected to the vender station, via a network, when the password transmitted from the vender station is validated. The server receives a request for the decryption key corresponding to the transmitted selected software product and the end-user serial number. The server then generates and transmits the decryption key to the vender station based on the selected software product and the serial number. Thereafter, the vender station transmits the decryption key to the end-user station, so that the end-user application program can decrypt the selected software product based on the received decryption key.

REFERENCES:
patent: 5319705 (1994-06-01), Halter et al.
patent: 5394469 (1995-02-01), Nagel et al.
patent: 5555304 (1996-09-01), Hasebe et al.
patent: 5586186 (1996-12-01), Yuval et al.
Manual, Type On Site, Mar. 1993, pp. 1-8.
Manual, Type On Site, Jul. 1992, pp. 1-8.

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