Cryptography – Cryptanalysis
Patent
1994-02-17
1995-05-30
Buczinski, Stephen C.
Cryptography
Cryptanalysis
355201, 380 21, 380 25, H04N 144, H04L 900, G03G 2100
Patent
active
054209226
ABSTRACT:
A system for safe transmission of a message with positive identification of the sender includes on the transmitter side telefax-type message-transmitting apparatus (10) and encryption means (22) for encrypting transmission signals from the telefax apparatus prior to transmission, and includes on the receiver side decryption means (25) for decrypting incoming signals prior to their receipt in telefax-type apparatus (20), and message enveloping and message gathering means (21) for safe storage of messages received by the telefax apparatus (20) in an enveloped form within a closed casing (11). Activating means (23) on the transmitter side includes a card reader (231) and keyboard (232) and is intended to activate the encryption means (22) in response to signals from the card reader (231) and the keyboard (232). Control means (24) on the receiver side function are adapted to activate the decryption means (25) in response to signals emanating from the card reader (231) and the keyboard (232). The control means (24) causes a marking to be applied to the top of each printed sheet commenced in the telefax apparatus (20) on the receiver side, this marking disclosing whether the transmitted message is an encrypted message or a clear language message.
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"Telefax mit integrierter Verschlusselung" Ascom Technische Mitteilungen, No. 2, 1991, Bern, Switzerland.
Bjorkman Claes
Eklund Lars
Lundblad Leif
Buczinski Stephen C.
Nybo Seal System AB
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