In the context of cryptography, the un-transformed message is known as plaintext, the transformation is known as encryption and the transformed message is known as ciphertext. The encryption process ...

A few months ago, GeekDad's Challenge of the Week was a lovely cipher about famous novels beginnings. I enjoyed solving it and that reminded me of a time where I was teaching younger students (12 to ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

Today we’re going to talk about how to keep information secret, and this isn’t a new goal. We’re going to walk you through some common encryption techniques such as the Advanced Encryption Standard ...

A 50-year-old mystery was recently solved when a group of intellectuals decoded a message allegedly sent by the infamous Zodiac killer. The message was sent to the San Francisco Chronicle in November ...

What secret alchemical knowledge could be so important it required sophisticated encryption? The setting was Amsterdam, 2019. A conference organized by the Society for the History of Alchemy and ...

Last month, two journalists decoded part of the famous Kryptos sculpture in front of the CIA building. It’s the latest news in the cryptography world, as ciphers continue to attract code crackers in ...