About This Website

About the Website

I have a broad interest in technology, science and history, with a main focus on electronics, programming and cryptology. I also have a passion for old crypto equipment and signals intelligence, both technically and historically, and in WW2 and Cold War history. The combination of all this resulted in a desire to bring to life some of the marvels of cryptology through software simulations, with an emphasis on authenticity and respect for their history.

In 2004, I decided to share my passion for cryptology and cipher machines by creating this website and the SIGINT Chatter blog. My goal is to get people interested in the intriguing world of cryptography and codebreaking, and to show how a seemingly boring subject can be a truly fascinating journey into history. I hope to inspire the reader to look beyond the well-known WW2 and Cold War stories, to discover the importance of intelligence work and how it influenced modern history. History is here to share!

The number of visitors and the kind feedback encourages me to keep this site up to date, and expand it whenever my free time allows me. I appreciate all feedback, additional information or reporting of broken links to improve this site. You can send an e-mail or write something in the guestbook.

The Internet Archive also preserves copies of this website and copies of the blog. If you encounter a dead external link or document on this website, then copy that link to the Internet Archive's Wayback Machine to find a preserved copy, as most links have been archived. Until 2021 this website was hosted at the address, which is no longer in use. The Internet Archive preserved copies of the old website

Screen size tip: To enlarge or reduce the website pages, simply hold the keyboard CTRL key and scroll the mouse wheel. Press CTRL and 0 to reset.
Font size tip: For samples of encrypted text, this website uses fixed-sized monospace font. If those letters appear too small or too large, compared to the other letters, then adjust this in your browser Chrome Settings - Appearance - Customize fonts - Minimum font size (slider) Firefox Settings - General - Language and Appearance - Advanced - Monospace size Edge Settings - Appearance - Fonts - Customize fonts - Minimum font size (slider).

Dirk Rijmenants

Copyright Notice

This website is created for educational purposes and its content and images are protected by international copyright laws. If you would like to use contents or images of this website, please ask first and permission is usually be granted for non-commercial use, provided that full credits and a link to this website are provided as follows: " Copyright Dirk Rijmenants". All images are copyrighted by me or by third parties. Some content comes from unknown sources. If you encounter copyrighted material on this website without proper reference, then please contact me and I will add the proper credits and references or remove the material. Contact me for further questions regarding the copyrighted content.

Privacy Statement & Cookie Policy

This website supports https to browse te pages securely and anonymously. The privacy of the visitors is respected and this non-commercial website does not use any online or offline database. No personal information about any individual visitor is stored, disclosed, distributed or sold to any third party. If you contact us, your e-mail address will only be used to reply if necessary. When you send a guestbook entry, your e-mail address is by default not published, unless you actively choose to make it visible in the guestbook. All offsite links to other websites are selected carefully, based on information value and quality.

This website uses Statcounter web statistics that help us improve and optimize the contents, performance and compatibility. For this purpose, an analytic cookie is sent to your computer. No personally identifiable information is retrieved or recorded. The statistics are date and time, visited page, browser, operating system version, screen resolution, referring link and IP address. More info at Statcounter Privacy Policy. You can opt to Refuse Statcounter Analytic Cookies or change the cookie settings directly in your browser Chrome, Firefox, Safari, Edge or Opera. Read all about cookies.


To the best of my knowledge, this site contains unclassified information only. All information has been obtained from publicly available sources. Whenever possible, references and links to the sources have been added. Although I do my best to present the contents of this website as correct as possible, I cannot guarantee it to be free from errors. I therefore cannot be held responsible for any damage arising from the use or misuse of the information on this website, or its suitability for any particular purpose.

Visit F-Secure

This site does not contain any spyware, adware or malware and its content is checked on a regular basis with antivirus software to keep it free from harmful software. You can check all software downloads on this website with their SHA-256 Hash Check. Nonetheless, I encourage all visitors to check all downloads on this website and on other websites with antivirus software. Prudence is a good habit!

Web Analytics Made Easy -

Dirk Rijmenants 2004. Last changes: 06 October 2022