Explaining one of the simplest and historically well-known ciphers, the Caesar cipher, Holden establishes the key mathematical idea behind the cipher and discusses how to introduce flexibility and ...

Caesar Ciphers are very simple methods of encryption because the work by shifting the alphabet over a few characters and matching up the letters (see the picture above)—in fact, if you've ever ...

Being limited by the alphabet, the Caesar Cipher has just 25 possible keys, and a computer could try all 25 in the blink of an eye.

Ciphers have been used long before computers showed up. Julius Caesar used what's now called a Caesar cipher, to encrypt private correspondence.

It turns out that the encryption it uses is just a few baby steps beyond a basic Caesar Cipher. A Caesar Cipher just shifts data by a numeric value. The value is the cipher key.

Julius Caesar used encryption to send his instructions to his armies, and the Caesar cipher, one of the earliest recorded ciphers, is named after him.

More alphabets and unbreakable encryption The weaknesses of the Caesar substitution cipher can be slightly alleviated by using more than one shifted alphabet.

While Caesar and other substitution ciphers will foil a casual glance, they are not particularly strong – a computer can try all possible substitutions in a matter of seconds. In fact, my 11 ...

Secret code or foreign language? For machines, it might not matter. Without any prior knowledge, artificial intelligence algorithms have cracked two classic forms of encryption: the Caesar cipher ...

A frequent industry speaker and educator, Roger currently works for KnowBe4 as the Data-Driven Defense Evangelist and is the author of Cryptography Apocalypse.