ECC based threshold cryptography for secure data forwarding and secure key exchange in MANET (I)

Abstract

This paper proposes a new approach to provide reliable data transmission in MANET with strong adversaries. We combine Elliptic Curve Cryptography and Threshold Cryptosystem to securely deliver messages in n shares. As long as the destination receives at least k shares, it can recover the original message. We explore seven ECC mechanisms, El-Gamal, Massey-Omura, Diffie-Hellman, Menezes-Vanstone, Koyama-Maurer-Okamoto-Vanstone, Ertaul, and Demytko. For secure data forwarding, we consider both splitting plaintext before encryption, and splitting ciphertext after encryption. Also we suggest to exchange keys between a pair of mobile nodes using Elliptic Curve Cryptography Diffie-Hellman. We did performance comparison of ECC and RSA to show ECC is more efficient than RSA. © IFIP International Federation for Information Processing 2005.