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June 23, 2008

Cryptography: The Caesar cipher


In cryptography, a Caesar cipher, is one of the simplest and most widely known encryption techniques.

It is a type of substitution cipher in which each letter in the plain text is replaced by a letter some fixed number of positions down the alphabet.

For example, with a shift of 1, A would be replaced by B, B would become c, and so on.

The method is named after Julius Caesar, who used it to communicate with his generals.

The Caesar cipher is AKA (also known as): Caesar's cipher, shift cipher, Caesar's code or Caesar shift.

Try it for yourself! Click here for a usable and downloadable Caesar cipher program!
or
Make your own cypher wheel, and create your own Caesar ciphers!

DEFINITIONS:
cryptography - the procedures, processes, methods, etc., of making and using secret writing, as codes or ciphers
encryption - to encipher or encode

1 comment:

Unknown said...

I heard only the name of this technique but above shared information helped to fully understand the meaning and its purpose. Although its a basic technique but is very powerful.
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