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Artist Releases Final Clues to Solve CIA Kryptos Puzzle
Dan Vergano, 2025. Scientific American.
Sanborn's November 2025 letter with four further hints (a 1986 trip to Egypt and the fall of the Berlin Wall; the World Clock; "delivering a message"; K5's link to the K2 line "its buried out there somewhere"), and his description of K5 as a 97-character text sharing some words in the same positions as K4.
What it's used for here
Sanborn's last public clues and his statement that K4 is not solved.
Our copy
Research copy, for editors and curators. The work is the publisher's, so readers are sent to it. We keep this copy so the citation can be checked if the page changes or goes.
scientificamerican.com · fetched 29 Oct 2026
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Cite it
Vergano, D. (2025). Artist Releases Final Clues to Solve CIA Kryptos Puzzle. Scientific American. https://www.scientificamerican.com/article/cia-kryptos-puzzle-creator-releases-final-clues/
@article{vergano2025clues,
author = {Vergano, Dan},
title = {Artist Releases Final Clues to Solve CIA Kryptos Puzzle},
journal = {Scientific American},
year = {2025},
url = {https://www.scientificamerican.com/article/cia-kryptos-puzzle-creator-releases-final-clues/}
}TY - JOUR TI - Artist Releases Final Clues to Solve CIA Kryptos Puzzle AU - Vergano, Dan PY - 2025 JO - Scientific American UR - https://www.scientificamerican.com/article/cia-kryptos-puzzle-creator-releases-final-clues/ ER -
Vergano, Dan. “Artist Releases Final Clues to Solve CIA Kryptos Puzzle.” Scientific American (2025).