In my collection I have :
TextTell - 1983 - Encrypted Text Transmission via Acoustic Coupler to
Telephone mouthpiece
( for Transmission ) and Telephone receiver ( for Reception )
Forbidden by the (then West) German BKA for showing at CeBIT 1983 fair
at Hannover
Photos on http://picasaweb.google.nl/nap210534/TextTell
Hope that someone can inform me on which algorithm and which keylenght
was used on these units.
T.I.A.
Nap van Zuuren - Gent - Belgium
nap.van.zuuren@[EMAIL PROTECTED]
