Time Stamp Based ECC Encryption and Decryption

Addepalli VNKrishna
Department of Computer Science and Engineering, Pujya Shri Madhavanji College of Engineering and Technology, India

Abstract: Elliptic Curve Cryptography provides a secure means of exchanging keys among communicating hosts using the Diffie Hellman Key Exchange algorithm. Encryption and Decryption of texts and messages have also been attempted. In the paper on Knapsack over ECC algorithm, the authors presented the implementation of ECC by first transforming the message into an affine point on the EC, and then applying the knapsack algorithm on ECC encrypted message over the finite field GF(p). The knap sack problem is not secure in the present standards and more over in the work the authors in their decryption process used elliptic curve discrete logarithm to get back the plain text. This may form a computationally infeasible problem if the values are large enough in generating the plain text. In the present work a new mathematical model is used which considers the output of ECC algorithm, a variable nonce value and a dynamic time stamp to generate the cipher text. Thus by having key lengths of even less than 160 bits, the present algorithm provides sufficient strength against crypto analysis and whose performance can be compared with standard algorithms like RSA.

Keywords: ECC, Time stamp, nonce value, mathematical model.

  Received August 23, 2011; accepted March 11, 2013