From: Eric Blossom <eb@comsec.com>
Date: Sun, 18 Aug 1996 05:14:57 +0800
To: cypherpunks@toad.com
Subject: CS8191 data sheet and ordering info...
Message-ID: <199608171837.LAA20948@comsec.com>
MIME-Version: 1.0
Content-Type: text/plain


Attached is the ascii version of the data sheet, followed by ordering
information.  Full protocol specifications will be available in about
2 weeks.

Eric

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                Communication Security Corporation
            CS8191 Triple-DES Telephone Privacy Device

With the growing number of tools available to assist in wiretapping,
anyone using a telephone in the '90's is vulnerable to unwanted
eavesdropping. With many of today's standard technologies, anyone can
gain access to our most private of conversations. As a result, the
telecommunications industry has an increasing need for private, secure
voice communication devices. The Communication Security Corporation
has dedicated its resources to addressing this need by designing the
CS8191, our flagship product and the most secure telephone privacy
protection available.


Unsurpassed Security 
 
Truly open, encryption technology is at the heart of the CS8191
telephone security unit. With the press of a button, the CS8191 is
activated. Within seconds your conversation is kept secure from the
intrusion of any type of wiretapping.


Open-Standard Encryption  

How are you assured that your tele-security unit is really working to
protect your telecommunications? In truth, the "trust-us" proprietary
solutions used by competing products are an indication of weak privacy
protection. They "hide" from the user, the ability to verify proper
functioning of the unit.

Communication Security provides users with the best privacy protection
by incorporating leading-edge encryption technology that utilizes the
power of truly open standards. Our commitment to an open specification
allows sophisticated users the ability to "check under the hood" and
evaluate the security attributes of the system. 


Portable And Easy To Use 
 
The CS8191 has been designed to work with conventional analog
telephone systems (POTS). The unit connects between your telephone and
the wall, much like a telephone answering machine. Plug in the power,
and that's it. In "clear mode" your telephone continues to work as it
normally does. To begin an encrypted conversation, simply press the
'go secure' button and wait for the green light to come on. The system
is easy to use and compact, making it the perfect telephone security
solution for home, travel or office use.

 
Superior Performance 
 
* As a standard component, Communication Security has incorporated a
  leading-edge speech coder for clarity unsurpassed in secure telephone
  devices, to date.

* Voice clarity is virtually undisturbed whether the system is in secure
  or clear mode.   

* LED indicators on the unit let you know instantly that your call is being
  transmitted securely.   

 
Service And Support

The Communication Security Corporation provides a one year warranty for all
parts and labor. Upgrades are included in the price of the CS8191 and are
available under the terms of the warranty. 
  

For More Information

To get more information on securing your phone communications, send
email to info@comsec.com or call (707) 577-0409, fax (707) 577-0413.


Features			Benefits

* Open standard	encryption	Allows independent evaluation and
				verification of protocol and behavior

* Excellent speech quality	Superior clarity is assured with leading-edge
				speech coder as a standard component

* Auto Secure			Allows for secure, unattended
				operation for all-hours data protection

* Small size and weight		Makes the CS8191 the perfect solution for
				secure home, office or travel telephone
				communications

Specifications:

 Modem

 * ITU V.32bis (14,400 bits/sec)

 Interfaces

 * Two buttons (Go Secure, Go Clear)

 * Two LEDs (Secure, Clear)

 * External power supply

 * Two modular phone jacks
 
 Power

 * Input voltage: 110 volts AC, 50-60 Hz.
 
 Approvals

 * FCC, part 15 and 68

 Warranty

 * 12 months parts and labor

 Software Upgrades

 * One year of upgrades included in purchase price

 Voice Nodes

 * Clear voice

 * Secure voice 

 Secure Mode Speech Compression

 * International standard GSM 06.10 full rate speech transcoding 
   (13,000 bits/sec)


Notes:

 * Specifications subject to change without notice.

 * Government regulations apply for export license.

 * Completing the circle of secure communication requires the receiving
   end of your call to also have a CS8191 unit connected to their phone.


Cryptographic Details:

* Unique session key generated for each conversation using Diffie-Hellman
  exponential key exchange (2048 bit modulus) (U.S. Patent No. 4,200,770
  licensed by Cylink Corporation)

* Defense against "man in the middle" active attack using interleave
  protocol combined with voice verification of six digit key name derived
  from the public exponentials

* Hardware Random number generator based on Johnson noise

* Three Key Triple-DES (168 bit key), operating in modified counter mode.
 
* No back door, "Key-Escrow" or GAK

* Open standard. Full protocol specifications available.


Communication Security Corporation
1275 Fourth St. Suite 194  Santa Rosa, CA 95404
Tel: 707-577-0409  Fax: 707-577-0413
info@comsec.com 


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     Yes,  I want real telephone privacy protection!


Send me ________ CS8191's at $995.00 each:      $____________

Shipping and Handling:				$_______10.00

California residents add sales tax:		$____________

Total:						$____________


I'm paying with Check or M/O ____  Visa / MC ____

Name on Card:______________________________

Card Number:_______________________________

Exp. Date:__________


Ship To:


_________________________________________


_________________________________________


_________________________________________


__________________________________________



Allow 6-8 weeks for delivery.


I am a US citizen or "Lawful Permanent Resident"   Yes____   No____


Make checks payable to: Communication Security Corp.

Mail or fax this order form to:

	Communication Security Corp.
	1275 Fourth St., Suite 194
	Santa Rosa, CA 95404
	v: 707-577-0409
	f: 707-577-0413