Cipher Mysteries

I'm getting a bit cheesed off with the Internet: every time I do a search for anything Cipher Mysteries-ish, it seems that half Google's hits are for ghastly sites listing "Top 10 Unsolved Mysteries" or "10 Most Bizarre Uncracked Codes". Still, perhaps I should be more grateful to the GooglePlex that I'm not getting "Top 10 Paris Hilton Modesty Tips" and ...

Tony Gaffney, a chess player / tournament organizer I knew back in the early 1980s when playing for Hackney Chess Club, made some fascinating comments to my recent blog post on The Subtelty of Witches and Eric Sams' attempted solution to the Dorabella Cipher. Firstly: having spent a looong time in the British Library looking at ciphers (you'll see why shortly), Tony ...

In a recent post, I mentioned the idea that the d'Agapeyeff cipher might involve a diagonal transposition on the 14x14 grid cryptologists suspect it may well have been based upon. To test this out a bit, I wrote a short C++ program (which I've uploaded here) which turns the number pairs into characters (for convenience) and prints ...

I know, I did blog about this only three days ago: but science moves ever onwards, OK? A nice email arrived from Robert Matthews, the author of an excellent page on the d'Agapeyeff Cipher: he mentioned that he had received an email in February 2006 from John Willemse in Holland, who had suggested a novel kind of transposition cipher ...

Back in 1939, Alexander d'Agapeyeff wrote a tidy little book called "Codes and Ciphers" on cryptography history: though you can now buy it print-on-demand, cheap copies of the original book often come up on the various second-hand book aggregators (such as bookfinder.com), which is where I got my copy of the "Revised and reset" 1949 edition. What is now generally ...