Difference between substitution and transposition cipher | Substitution vs Transposition Cipher | Transposition vs Substitution Cipher

Introduction

There are basically two types of symmetric cipher: Substitution Cipher, Transposition Cipher.

Substitution Cipher: A substitution is a technique in which each letter or bit of the plaintext is substituted or replaced by some other letter, number or symbol to produce cipher text. For Example, ABC à XYZ

Types of Substitution Cipher: Caesar Cipher, Monoalphabetic Cipher, Vigenère Cipher, Playfair Cipher, One time pad cipher (Vernam cipher), Hill Cipher.

Transposition Cipher: In transposition technique, there is no replacement of alphabets or numbers occurs instead their positions are changed or reordering of position of plain text is done to produce cipher text. For Example, ABCDE  à  BADE.

Types of Transposition Cipher: Rail Fence Cipher, Columnar Transposition Cipher.

 

Difference between Substitution Cipher and Transposition Cipher

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