Caesar cipher

Etymology
From its supposed use by Julius Caesar to communicate with his generals.

Noun

 * 1) A simple form of encryption in which each letter in the plaintext is shifted through the alphabet a number of positions (for example A&rarr;D, B&rarr;E, C&rarr;F, etc.).

Translations

 * Icelandic: reiknirit Sesars
 * Russian: шифр Це́заря