So much has happened in the world of cryptography and codebreaking over the past few weeks that I haven’t been able to blog about everything interesting that has crossed my path. Today, I would like to catch up on a few things that definitely deserve a mention.

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At the moment, one decryption breakthrough follows another. As I have mentioned several times before, thanks to AI, we are currently witnessing a wave of breakthroughs in historical cryptanalysis unlike anything we have ever seen before – and probably anything we will ever see again.

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Bogusław Wróbel, a journalist from Poland, came across two encrypted messages dating back to the Second World War during his research. The messages date to 1944 or early 1945 and likely originated from the highest echelons of the SS. The plaintext is in German.

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The German podcast Jahrhundertgeschichten has released an episode about the Zodiac Killer, in which I was interviewed as an expert.

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Today’s crypto mystery comes from Wenzel Grüß, one of the world’s leading mental calculators. At the end of this article, there is some more information about him. His abilities are truly impressive.

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The cryptogram presented today was brought to my attention by blog reader Alex Ulyanenkoff. It appears on a page of a notebook that its owner has presented on Facebook.

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At the moment, cipher solutions are falling like ripe fruit from the trees. In just the past few days, I have reported on the solutions of the Wood Cryptogram, the Kaliningrad Cryptogram, and the Köhler Cryptograms. In all of these cases, artificial intelligence played a crucial role.

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Right now, one cryptanalytic breakthrough is following another. The autumn of 2026 will undoubtedly go down in the history of cryptology. Thanks to AI-assisted methods, cryptographic cold cases that have resisted solution for decades are suddenly being cracked one after another.

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For the past few weeks, I have been working with several colleagues on a new cartoon series for my employer called Evi & Den.

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It is incredible. Yet another Top-50 crypto puzzle has been cracked with the help of AI.

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