Facsimile and static presentation processing – Facsimile – Auxiliary signal
Patent
1992-08-18
1995-07-11
Miska, Vit W.
Facsimile and static presentation processing
Facsimile
Auxiliary signal
358438, 379100, H04N 132, H04M 1100
Patent
active
054326184
ABSTRACT:
A method that enables the certification, at reception as well as at transmission, of messages sent by facsimile includes writing characteristic elements of a message in a rectangular box at the head of this message. A certifier device is used to decode alphanumerical characters of this box, encrypt them, and fashion an alphanumerical seal which is transmitted on the line of the facsimile machine with the standard code of facsimile transmission signals. At reception, the seal appears at the bottom of the message while the box appears always at the top of the message. To authenticate this seal, the receiver may approach an information retrieval center which will carry out the encoding operation on the contents of the box and compare the result with the seal to authenticate the message. When both ends are equipped, the receiver facsimile machine sends the sender facsimile machine an acknowledgment of receipt including the contents of the seal which is itself encoded, thus enabling the sender to authenticate the reception in the same way as the receiver has authenticated the received message. It enables a message transmitted by fax to be given the same legal quality as a message transmitted by telex.
REFERENCES:
patent: 4672459 (1987-06-01), Kudo
patent: 4759053 (1988-07-01), Satomi et al.
patent: 4941170 (1990-07-01), Herbst
patent: 4960981 (1990-10-01), Benton
Research Disclosure No. 302, Jun. 1989, Havant GB A method for Prevention of Unauthorized duplication of Documents, pp. 461-462 (4 pages).
Monnot Jerome
Sureaud Jean
Gemplus Card International
Miska Vit W.
Plottel Roland
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