Digital signature generator/verifier/recorder (DS-GVR) for analo

Details Digital signature generator/verifier/recorder (DS-GVR) for analo Digital signature generator/verifier/recorder (DS-GVR) for analo

1994-08-17

1997-01-28

Barron, Jr., Gilberto

Cryptography

Key management

Having particular key generator

380 30, H04L 930, H04N 144

Patent

active

055984738

ABSTRACT:
A method and apparatus authenticates and provides non-repudiability for analog messages which renders it impossible for a person, including the recipient, who is not in possession of a (cryptographic) key belonging to the claimed sender, to forge the message. The recipient is able to verify that the sender possessed the correct key, and a third party (judge) can establish whether the message was forged or not. This is accomplished by interposing a digital signature generator/verifier/recorder (DS-GVR) module in the sending apparatus, such as a facsimile machine. The receiver, using another DS-GVR, can verify that a received document comes from the purported sender and has not been altered enroute. The receiver's DS-GVR module can be made to produce a machine-readable record of the signed transmission. Retention of such a machine-readable record by the receiver prevents the sender from repudiating legitimate messages, because it enables the receiver to prove to a third party such as a judge that the corresponding message was generated by the sender and not by the receiver.

REFERENCES:
patent: 4140873 (1979-02-01), Kinch, Jr. et al.
patent: 5018196 (1991-05-01), Takaragi et al.
patent: 5097504 (1992-03-01), Camion et al.
patent: 5168371 (1992-12-01), Takayanagi
patent: 5337362 (1994-08-01), Gormish et al.

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