Simple c program for caesar cipher

Change Language. Related Articles. Table of Contents. Improve Article. Save Article. Like Article. A python program to illustrate Caesar Cipher Technique. Encrypt uppercase characters. Encrypt lowercase characters. IsUpper text[i]. 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. Let us know in the comments if you are having any questions regarding this cryptography cipher Algorithm. And if you found this post helpful, then please help us by sharing this post with your friends. It is a mono-alphabetic cipher wherein each letter of the plaintext is substituted by another letter to form the ciphertext.

It is a simplest form of substitution cipher scheme. This cryptosystem is generally referred to as the Shift Cipher. This number which is between 0 and 25 becomes the key of encryption.