Diversified Caesar Cipher for Impeccable Security

Abstract

In the communication systems, two parties are involved in the communication i.e. sender and receiver. Both the parties share the information after encryption with secret key. It is very dangerous to transmit the information over internet without encryption because of various potential attacks. Attackers always try to capture the information that is sent between sender and receiver. Various techniques are emerged to provide information security. Caesar cipher is one of the encryption techniques which encrypt message in the form of alphabets only. In this paper, a new improved technique of Caesar cipher is proposed in which encryption is not restricted only to alphabets. The diversified Caesar cipher has capability to encrypt symbols, characters as well as digits. A new character value table is also proposed which specifies the positions of symbols, characters and digits in the table. Moreover, matrix concept is used to make the Caesar cipher more complex which creates difficulty for brute force attacker to determine the key value.