WELCOME

This website covers WW2 and Cold War era cipher machines, detailed technical and historical information, and manual ciphers. Learn how the equipment works and how it was operated. You can download realistic software simulations that work exactly like the real machines. This website is also preserved on the Internet Archive.

Kies Nederlands

RECOMMENDED PAGES

U.S. KL-7 ADONIS

Enigma Simulator

One-Time Pad

Numbers Stations

Operation Tinker Bell

SIGINT Blog

WEBSITE
Articles
Links
Downloads
Book Reviews
About the Website

NEWS CAST BLOG
Crypto News 8 *
Crypto's Cast 3
SIGINT Chatter 279

CONTACT
E-mail
Guestbook

SCREEN ZOOM
Press CTRL & Scroll

Crypto Tour Click these icons to discover other related sites

CONTACT & INFO

E-mail

Guestbook

News

Off-Site

About

Archive

RECENT UPDATES * 04 October 2025 Refresh for Latest Updates

Enigma Challenge Rudolf Frank from Germany is 93rd to complete challenge.
Enigma Challenge Rolf Schneider from Switzerland is 92nd to complete challenge.
History TSEC/KL-7 Version 5.2 more details, clarifications and improved text.
KL-7 Tech & History NATO docs Walker and Helmich spy cases added.
Crypto News Papers from British computer pioneer Alan Turing auctioned.

COPYRIGHT & PRIVACY INFORMATION

SEARCH THIS WEBSITE