About Kryptos & Jim Sanborn

The Sculpture

Kryptos is a sculptural installation at the headquarters of the Central Intelligence Agency in Langley, Virginia. Dedicated on November 3, 1990, it is the work of American artist Jim Sanborn, with cryptographic consultation from Ed Scheidt, retired Chairman of the CIA Cryptographic Center.

The sculpture consists of a large S-shaped copper screen inscribed with four encrypted messages, set between a petrified tree and a pool of water, surrounded by granite slabs bearing a Vigenère tableau and other encoded elements. It is widely considered one of the most famous unsolved codes in the world.

Three of the four messages were solved by CIA analyst David Stein in 1998, classified at the time, and independently by computer scientist Jim Gillogly in 1999. The fourth has resisted every attempt since.

Bar widths are the real character counts. K4 is the shortest section on the sculpture and the only one still unread.

How the cipher works

K1 and K2 use Quagmire III, and the tableau it needs is carved into the granite beside the sculpture. It is a lookup table: plaintext letter along the top, key letter down the side, ciphertext letter where they meet.

The alphabet is not A to Z. It starts with KRYPTOS and then runs through the letters that keyword has not already used, which is why the top row reads KRYPTOSABCDEFGHIJLMNQUVWXZ.

Jim Sanborn

Jim Sanborn is an American sculptor whose career spans five decades. His work explores the intersection of science, nature, and secrecy, from uranium-ore installations to lodestone compass pieces to encrypted texts embedded in stone and copper. Kryptos is his most widely known work, but it represents one facet of a deeply considered artistic practice.

Sanborn conceived Kryptos not as a puzzle but as a layered meditation on the nature of intelligence, hidden knowledge, and the act of discovery itself. He spent two and a half years hand-cutting the letters with 20 assistants, going through 900 jigsaw blades in the process. He composed the plaintext himself (deliberately cryptic prose that “alludes to things beyond Kryptos”) so that as few people as possible would know its contents.

Acknowledgment

Kryptos is Jim Sanborn’s work, and this site exists because of it. See jimsanborn.net.

What This Site Is (and Isn’t)

kryptosbot.com is an open-source elimination database. It documents what has been tested, what has been ruled out within bounded assumptions, and which claims were later retired, so that the K4 community can focus its energy on genuinely open approaches rather than independently re-discovering dead ends.

This site does not claim to be close to solving K4. It has no access to private information and is not affiliated with Jim Sanborn, Ed Scheidt, the CIA, the Smithsonian Institution, or Paradigm Operations LP. Every result published here is reproducible from the open-source codebase.

Related Works by Sanborn

Antipodes (1997): A sister sculpture at the Hirshhorn Museum (Smithsonian) in Washington, D.C. Two copper scrolls attached to petrified wood, repeating elements of the Kryptos text with deliberate differences. Sanborn has stated there is “one clue” on Kryptos that is not on Antipodes. The Hirshhorn piece is publicly accessible without security clearance.

Cyrillic Projector (1997): An installation at the University of North Carolina at Charlotte. A bronze cylinder with Cyrillic text cut through its walls, using a Vigenère cipher with the keyword ТЕНЬ (Russian for “shadow”). The encrypted content includes KGB documents about Andrei Sakharov and Boris Pasternak. Solved in 2003 by Frank Corr and Mike Bales. Sanborn’s working charts for this piece (preserved at the Smithsonian) reveal a multi-step encoding process (letters to Morse code to binary numbers) used to control the cutting tool, confirming his familiarity with Morse code as a working tool. We tested this same encoding process on K4 and it didn’t produce any matches, though it can’t be entirely ruled out as one layer of a more complex scheme.