SurFax, Security Encryption System For Facsimile

[jbcondat () attmail com <jbcondat () attmail com>]

                           SURFAX

High Security Encryption System for Facsimile Communication


* Connected between any GIII facsimile equipment and the telephone line;
* Use a high performance crypto algorithm (2'(59) = 10'(18) possible
  cipher keys);
* Designed for finance, commercial and industrial operations;
* very easy and friendly handling.

SurFax, used on both side of the PSTN with group 3 fax, provides security
for all the transmitted documents.

Installation
+------------

  +-----+    +--------+         +--------1         +--------+    +-----+
  | Fax |====| Surfax |=====>   |  PSTN  |   <=====| Surfax |====| Fax |
  +-----+    +--------+         +--------+         +--------+    +-----+

Simply plugin and add-on
No modification required to the fax equipment


Operation
+---------

10-key keyboard
16 digits LCD display
Secret key handling with keyboard
Plain mode / encryption mode selectable with keyboard and hardkey
Dimensions: 16 x 20 x 12 cm
Weight: approx. 1.3 kg
Power: 110/200 VAC, 50/60 Hz


Facsimile Technical Specifications
+----------------------------------

Two facsimile modems
Transmission speed: 9600/7200/4800/2400 bit/s
                    (CCITT V29, V27ter, V21)
Designed to work with Group III facsimile equipments
Fully compatible for transmission to non-crypto fax equipment (T30 protocol)


Security Features
+-----------------

SurFax is a secret key system type.

(1) KEY MANAGEMENT

The system has an integrated key management.  The user has to enter his 8
figures secret key on keyboard.  A physical key allows the user to let
Surfax in the chosen mode (plain or cipher).

     Otherwise, secret key can be erased at any time at the touch of a button,
and is automatically erased after each communication.  A 32-bit session key is
generated by a "built-in" random number generator.

     Both secret and session keys are combined into a cypher key (2'(59)
possible values) on each terminal.  Both secret and session keys are never
transferred in clear between the two terminals.  A new cypher key is created
for each transmitted page.  Closed user groups can be created by request to
the manufacturer (by setting a customer specific parameter).

(2) CIPHER TECHNOLOGY

The K.E.A. (KTT Encryption Algorithm) is KTT proprietary.  It is a realtime
data ciphering process and is used to encrypt only the facsimile data.

     It is based on a random generator, which initial state relies on a cipher
key, issued from a secret key and a session key (2'(59)).


More informations
+-----------------

Mr David COHEN
SKTT Henry Kam Technologies & Telecommunations
2d rue de l'Epine Prolongee
93541 Bagnolet Cedex
Phone: +33 1 42 87 54 00
Fax:   +33 1 42 87 23 91


                         Jean-Bernard Condat
                          General Secretary
     Chaos Computer Club France, B.P. 155, 93404 St-Ouen Cedex, France
          Private Address: P.O. 8005, 69351 Lyon Cedex 08, France
               Phone: +33 1 40101764, Fax: +33 1 47877070
         InterNet: jbcondat () attmail com   or   cccf () altern com