Paper Details

ABSTRACT

In asymmetric key cryptography, also called public key cryptography, two different keys (which form a key pair) are used. One key is used for encryption and 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 someone obtains a key pair, he/she can communicate with anyone else. “The short range natural number (SRNN) algorithm” is similar to RSA algorithm with some modifications. This modification increases the security of the cryptosystem. In this algorithm extremely large number has two prime factors (similar to RSA).Also this Technique two key pair has been used, one small size key pair for data encryption and one large size key pair to encrypt key component(n=p*q) of small size key pair. This natural numbers increases the security of cryptosystem. So its name is “Modified RSA public key cryptosystem using two key pairs”.