Modified RSA Public Key Cryptosystem Using Short Range Natural Number Algorithm

In asymmetric key cryptography, also called Public Key cryptography, two different keys (which forms a key pair) are used. One key is used for encryption & only the other corresponding key must be used for decryption. No other key can decrypt the message – not even the original (i.e. the first) key used for encryption. The beauty of this scheme is that every communicating party needs just a key pair for communicating with any number of other communicating parties. Once some one obtains a key pair, he /she can communicate with any one else. The Short Range Natural Number (SRNN) algorithm is similar to RSA algorithm with some modification. This modification increases the security of the cryptosystem. In this algorithm we have an extremely large number that has two prime factors ( similar to RSA ). In addition of this we have used two natural numbers in pair of keys (public , private).These natural numbers increase the security of the cryptosystem. So its name is “Modified RSA Public Key Cryptosystem using Short Range Natural Number Algorithm”. KeywordsCryptography, RSA, Key, Symmetric Key and Asymmetric Key Cryptography. ___________________________________________________________________________________________________