Caesar cipher

From Citizendium
Revision as of 16:00, 23 July 2024 by Suggestion Bot (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
This article may be deleted soon.
To oppose or discuss a nomination, please go to CZ:Proposed for deletion and follow the instructions.

For the monthly nomination lists, see Category:Articles for deletion.


This article is developing and not approved.
 Main Article
 Discussion
Related Articles  [?]
Bibliography  [?]
External Links  [?]
Citable Version  [?]
 
https://en.citizendium.org/wiki/index.php?title=Caesar_cipher&printable=yes
This editable Main Article is under development and subject to a disclaimer.

An early and simple substitution cipher was the Caesar cipher, in which each letter in the plaintext was replaced by a letter some fixed number of positions further down the alphabet. It was named after Julius Caesar who used the cipher with a shift of 3 in order to communicate with his generals during his various military campaigns.

For example, with a shift of 3, "BAD DOG" would become "EDG GRJ". This type of encryption is trivial to cryptanalize using frequency analysis.

One Caesar cipher is still in use; rot 13 is used to hide "spoilers" such as the ending of a movie in Internet discussions. It is not used for any serious security.

Retrieved from "https://citizendium.org/wiki/index.php?title=Caesar_cipher&oldid=965723"