Double Transposition consists of two applications of columnar transposition to a message. The two applications may use the same key for each of the two steps, or they may use different keys.

Scientists say that hiding secret messages using AI chatbots could lead to a world of iron-clad encryption.

Quantum encryption rests on the idea that if two parties share a secret key, they can scramble a message so that only they can decode it.

End-to-end encryption is a system of communication where the only people who can read the messages are the people communicating. No eavesdropper can access the cryptographic keys needed to decrypt ...

Her duress code was to use a double transposition key with precisely 18 letters, so we know this message was not sent under duress.