Facsimile apparatus

Details Facsimile apparatus Facsimile apparatus

2005-05-31

2005-05-31

Sheikh, Ayaz (Department: 2131)

Cryptography

Facsimile cryptography

C380S244000, C380S245000, C380S246000, C380S255000, C380S266000

Reissue Patent

active

RE038739

ABSTRACT:
A facsimile apparatus is provided with changeover means that makes it possible to pass signals through or to bypass a coder, which encrypts transmission information, and a decoder, which decodes encrypted information that has been received. Whether or not a facsimile apparatus belonging to another party has an encrypting/decoding processing function is verified by a pre-procedure signal. If the other party's apparatus possesses an encrypting/decoding processing function, control is performed in such a manner that encrypting/decoding processing is applied solely to an image signal and a training-check signal transmitted before transmission/reception of the image signal, and encrypting/decoding processing is not applied to a procedure signal which accompaniesdelete-start id="DEL-S-00001" date="20050531" ?transmission receptiondelete-end id="DEL-S-00001" ?insert-start id="INS-S-00001" date="20050531" ?transmission/receptioninsert-end id="INS-S-00001" ?of the image signal. If the other party's apparatus does not possess an encrypting/decoding processing function, it is possible to select between terminating communication and performing facsimile communication without executing encrypting/decoding processing.

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