1. Rail Fence Cipher Program In C
2. Playfair Cipher

Rail Fence Cipher Program In C

Given a plain-text message and a numeric key, cipher/de-cipher the given text using Rail Fence algorithm. The rail fence cipher (also called a zigzag cipher) is a form of transposition cipher.

It derives its name from the way in which it is encoded. Examples: Encryption Input: 'GeeksforGeeks ' Key = 3 Output: GsGsekfrek eoe Decryption Input: GsGsekfrek eoe Key = 3 Output: 'GeeksforGeeks ' Encryption Input: 'defend the east wall' Key = 3 Output: dnhaweedtees alf tl Decryption Input: dnhaweedtees alf tl Key = 3 Output: defend the east wall Encryption Input: 'attack at once' Key = 2 Output: atc toctaka ne Decryption Input: 'atc toctaka ne' Key = 2 Output: attack at once.

Program To Decrypt Rail Fence Cipher Codes and Scripts Downloads Free. This is a simple program to encrypt, or Seal letters and messages for transmitting over the.

Playfair Cipher

Encryption To encrypt a message using the Rail Fence Cipher, you have to write your message in zigzag lines across the page, and then read off each row. Firstly, you need to have a key, which for this cipher is the number of rows you are going to have. You then start writing the letters of the plaintext diagonally down to the right until you reach the number of rows specified by the key. You then bounce back up diagonally until you hit the first row again.

This continues until the end of the plaintext.