Kryptos

A coded sculpture at CIA headquarters has yet to be fully broken.

Cryptography 101

Learn different ways to make a message secret.

Send a Secret Message

Write a note, encode it, and send it to a friend for decoding.

Ask the Expert

Artist James Sanborn, the mastermind behind the still-partly-unsolved Kryptos puzzle, answers questions about making—and breaking—codes.

Codebreaking Challenge #2

Can you solve our new code-breaking challenge?

Codebreaking Challenge #1

Can you solve our first code-breaking challenge, presented on July 24, 2007?

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© | Created July 2007