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 ...

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When encryption is required, and one node signals another to begin a transmission session, there are often several cryptographic ciphers (algorithms) supported at each side. The negotiation ...

A cipher is a code used to protect information that is being stored or communicated, so that only people who are allowed to can access it. With this fun challenge, brought to you in partnership ...

This was one of the most secure hand ciphers used in the Second World War. It was used by both the Allies and the Axis, and served both well. Its main weakness was that if the attacker intercepted ...