International Journal on Computer Science and Technology (IJCST)
In today's information age, information sharing and transfer has increased exponentially. Security, integrity, non-repudiation, confidentiality and authentication services are the most important factors in information security. Of all the methods of encryption ever devised, only one has been mathematically proved to be completely secure .It is called the Vernam cipher or one time pad. The worth of all other ciphers is based on computational security. If a cipher is computationally secure this means the probability of cracking the encryption key using current computational technology and algorithms within a reasonable time is supposedly extremely small, yet not impossible.