Ultimate Decoder (Free with Decoder Club Subscription)

We've crafted the ultimate decoder – the kind you always dreamt of as a kid. A small, lovingly crafted tool designed for secret messages. Send one to a friend and start your own correspondence in code.

Or sign up for our Decoder Club and get your Decoder for free!

The Decoder Club is a monthly mail club where you can find secret messages, unlock hidden missives, chart new digital territories, and win tiny treasures.

Once you receive your Decoder (free with membership signup) a carefully designed, beautifully crafted postcard with a coded message will arrive each month in your physical mail box. 

It might be a password that sets off a digital adventure, a delightful poem to savor, or a more complex, multi-part puzzle.

Hidden within each monthly puzzle is also a fragment of the Calendar Cipher, a larger mystery revealed piece by piece throughout the year. When all twelve fragments are assembled, the cipher reveals a final password that unlocks prizes large and small.

In addition, we've been sprinkling secret messages in plain sight in the physical, traveling version of the museum.  Bring your Decoder when you visit for a special set of puzzles and prizes.