From ddec3085ae0be2053c3fa3d11266885169709807 Mon Sep 17 00:00:00 2001 From: Harshil Date: Sun, 14 Aug 2016 00:51:17 +0530 Subject: [PATCH] Update README.md --- README.md | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index b643d3686..1aaa5898d 100644 --- a/README.md +++ b/README.md @@ -82,7 +82,12 @@ Add comments here ## Ciphers ### Caesar -Add comments here +![alt text][caesar] +In cryptography, a **Caesar cipher**, also known as Caesar's cipher, the shift cipher, Caesar's code or Caesar shift, is one of the simplest and most widely known encryption techniques.
+It is **a type of substitution cipher** in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet. For example, with a left shift of 3, D would be replaced by A, E would become B, and so on.
+The method is named after **Julius Caesar**, who used it in his private correspondence.
+The encryption step performed by a Caesar cipher is often incorporated as part of more complex schemes, such as the Vigenère cipher, and still has modern application in the ROT13 system. As with all single-alphabet substitution ciphers, the Caesar cipher is easily broken and in modern practice offers essentially no communication security. +###### Source: [Wikipedia](https://en.wikipedia.org/wiki/Caesar_cipher) [bubble-toptal]: https://www.toptal.com/developers/sorting-algorithms/bubble-sort [bubble-wiki]: https://en.wikipedia.org/wiki/Bubble_sort @@ -103,3 +108,4 @@ Add comments here [selection-toptal]: https://www.toptal.com/developers/sorting-algorithms/selection-sort [selection-wiki]: https://en.wikipedia.org/wiki/Selection_sort [selection-image]: https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Selection_sort_animation.gif/250px-Selection_sort_animation.gif "Selection Sort Sort" +[caesar]: https://upload.wikimedia.org/wikipedia/commons/4/4a/Caesar_cipher_left_shift_of_3.svg