Why This Site Exists
Kryptos K4 has been unsolved for over 35 years. Over that time, countless people have tested countless theories, mostly in isolation, often duplicating work that others already tried. This site documents what has been tested so the community can focus on what hasn’t.
The Sculpture
Jim Sanborn and his assistants cut almost 2,000 letters through copper plate by hand, with jigsaws: nearly 870 characters of encrypted text on one half of the S-curved screen and an alphabet table on the other. The result is one of the most widely recognized works of public art in the intelligence community, and one of the most famous unsolved ciphers. Kryptos stands in a courtyard at CIA headquarters, which is not open to the public, but Sanborn’s 1997 sister sculpture, Antipodes, repeats much of the same text and belongs to the Smithsonian’s Hirshhorn Museum in Washington, a public museum rather than a secure government site.
This site is built with deep respect for Sanborn’s work and the community of solvers who have spent years studying it.
The Project
kryptosbot is a public research archive. It also records which of its own earlier claims were later retired.
The project is a collaboration between Colin Patrick and Claude (Anthropic). Together we have tested 721.7B+ configurations across 597 recorded experiments. That is a record of what has been tested, not proof that every classical method is ruled out: some earlier eliminations have since been narrowed or withdrawn, and some standard hand-cipher families are still open.
The codebase is public on GitHub. Many results can be re-run from the scripts in the public repository. Some cannot yet: newer scripts are not all published, some runs depend on source texts that are not in the public repository, and some older results have been withdrawn or are being redone after audits found errors in them. If you think you have an approach we haven’t tried, submit it, or better yet, clone the repo and prove us wrong.
About Colin
I’m a cybersecurity practitioner based in Kentucky, with a background in audio engineering, film, and telecommunications.
I didn’t set out to work on Kryptos. But if you’re the kind of person who can’t walk away from a hard puzzle, at some point the sculpture at CIA headquarters stops being an interesting footnote and starts feeling like it’s staring back at you.