What is a Cipher?
Ciphers are the specific algorithms which are used to encrypt and decrypt data. A cipher is series of well-defined steps that can be followed as a procedure to encrypt and decrypt messages. Cipher Methods Transposition Cipher · No letters are replaced. They are simply rearranged. · E.g.: Backward cipher Rail fence cipher Scytale DES/3DES One Time Pad · Key is consis...