Researchers estimate that roughly 1% of all archival material is fully or partially encrypted, leaving a vast body of historical records inaccessible without specialized decoding techniques ...

Deep in the archives of the Vatican library, a mysterious hand-written book, scrawled with strange symbols, had lain unread for more than 400 years. Its cryptic pages apparently concealed secret ...

In Part I, you broke a simple cipher. Now try creating a more complex cipher. Cut out the NOVA Decoder Ring and NOVA Cipher Code Ring and the window marked INDEX. You are now going to put this simple ...

Here's your chance to crack ciphers similar to those Bletchley Park's codebreakers faced during World War II. Below, we present three ciphers of different levels of difficulty, from easiest to most ...