CIPHER MACHINES AND CRYPTOLOGY
    Technical and historical information about cipher machines and the fascinating world of cryptology

 
         


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.

RECOMMENDED PAGES


U.S. KL-7
ADONIS

Enigma
Simulator

One-Time
Pad

Numbers
Stations

Operation
Tinker Bell

SIGINT
Blog
  ENIGMA
Enigma History
How Enigma Works
Message Procedures
The U-boat War
Kurzsignale
M4 Project and U-264
Enigma at School
Enigma FAQ's
Codebook Tool
Enigma Simulator

U.S. TSEC/KL-7
KL-7 Tech & History *
KL-7 Simulator

HAGELIN
Hagelin Crypto AG
B-21
C-52/CX-52
BC-52 Simulator
M-209 Simulator


OTHER MACHINES
Machines Timeline
Colossus
Focus on Photo
Focus on Machines
CRYPTOGRAPHY
Crypto - Brief History
One-time Pad
Checkerboards
Hand Ciphers
Rasterschlussel 44
Secret Splitting
Visual Cryptography
The Gold-Bug
Amanda Pinson
SHA-256 Secure Hash

SIGNALS
Cold War Signals
Numbers Stations
TEMPEST
Shortwave Listening

SOFTWARE
Simulators
Cipher Classics
Crypto Box
Numbers 9.0

CHALLENGES
Enigma Challenge
Crypto Box Challenge
Elite Box Challenge
Operation Tinker Bell *
The Crow's Cryptogram

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


Amanda Pinson Honoring

CONTACT & INFO


E-mail

Guestbook

News

Off-Site

About

Archive
 

RECENT UPDATES * 12 September 2025 Refresh for Latest Updates

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.
Enigma Challenge Yingjie Wang from China is the 91st to complete challenge.
Crypto News Papers from British computer pioneer Alan Turing auctioned.
Elite Box Challenge George Lasry from Israel fourth to solve one Elite Box.

COPYRIGHT & PRIVACY INFORMATION

This website is created for educational purposes and its content is protected by international copyright laws. Use of content only after permission. Copyrights, privacy, cookie policy and disclaimer.

© Dirk Rijmenants 2004 - 2025 views
 

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