Caesar cipher: Difference between revisions
Jump to navigation
Jump to search
imported>Sandy Harris (rot 13 link) |
mNo edit summary |
||
| (One intermediate revision by one other user not shown) | |||
| Line 1: | Line 1: | ||
{{subpages}} | {{PropDel}}<br><br>{{subpages}} | ||
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. | 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 [[cryptanalysis | cryptanalize]] using [[frequency analysis]]. | For example, with a shift of 3, "BAD DOG" would become "EDG GRJ". This type of encryption is trivial to [[cryptanalysis | 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. | 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.[[Category:Suggestion Bot Tag]] | ||
Latest revision as of 17:00, 23 July 2024
| This article may be deleted soon. | ||
|---|---|---|
 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. |
||
