Kryptos Sculpture: The CIA’s Unsolvable Enigma
The Kryptos sculpture is an encrypted copper screen that artist Jim Sanborn installed at CIA headquarters in 1990. Its 869 characters hold four messages. Cryptanalysts solved the first three by 1999. The fourth, K4, has never been cracked. In 2025 its plaintext surfaced from an archive, but the cipher itself remains unbroken. Published: June 5, […]
Voynich Manuscript: Deciphering an Ancient Puzzle
By Iris Kowalczyk · Published May 8, 2026 · Updated May 13, 2026 Last reviewed: May 8, 2026. The Voynich Manuscript: A Cold-Case File on the World’s Most Studied Cipher The Voynich Manuscript is a 234-page illustrated codex written in an unknown script, carbon-dated to 1404-1438 and held at Yale’s Beinecke Rare Book and Manuscript […]