About This Website

About the Website

I have a broad interest in technology, science and history, but my main fields of interest are electronics, programming and cryptology. I also have a passion for old cipher machines, classical cryptology and signals intelligence, both technically and historically, and in WW2 and Cold War history. The combination of all these 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 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 by sending an e-mail or by writing something in the guestbook.

You can also visit the Legacy Edition mirror of this website. The Internet Archive also preserved copies of Cipher Machines and Cryptology, Legacy Edition, and SIGINT Chatter (bookmark them also). Make sure to select the most recent version of the preserved copy on the Internet Archive. 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link to the Internet Archive's Wayback Machine to find a preserved copy of that webpage, as most external links have been archived.

Copyright Notice

This website was 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 will usually be granted under the condition that full credits and a link to this website are provided as follows: Copyright Dirk Rijmenants 2004 Cipher Machines and Cryptology. The website contents is only available for non-commercial use. All images are copyrighted by me or by third parties. Please contact me for permission to use them and for further questions about the copyrighted material. If you encounter copyrighted material on this website without a proper reference, then please contact me and I will add your proper credits or remove the material.

Privacy Statement

I respect the privacy of the visitor, do not collect any information about any individual visitor and will not disclose, distribute or rent any information to any third party. If you choose to provide an e-mail address then I will use it only to reply. Providing your e-mail or other information in the guestbook will make this information visible to all visitors. You can choose to use the dummy e-mail address. All off-site links on my website, directing you to other websites, are selected carefully, based on information value and quality. This website uses Statcounter web statistics to improve and optimize the contents for its readers. For this purpose, a cookie is sent to your computer. No personally identifiable information is retrieved or recorded. More info at the Statcounter website.


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 noted. 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 can not 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-SecureThis site does not contain any spyware, adware or malware and it 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!

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Dirk Rijmenants 2004 - 2021. Last changes: 26 July 2021