CONFIDENTIAL KEY PRODUCTION FOR SECURE PACKET TRANSFER IN MULTI-NODE MESH NETWORKS

This paper studies the key generation problem in the two-way relay channel, in which there is no direct channel between the key generating terminals. We propose an effective key generation scheme that achieves a substantially larger key rate than that of a direct channel mimic approach. Unlike existing schemes, there is no need for the key generating terminals to obtain correlated observations in our scheme. Secure key distribution schemes for group communications allow establishing a secure multi cast communication between a group manager and group members through an unreliable broadcast channel. The improved efficiency for key management is realized by periodically refreshing all public private key pairs as well as any multicast keys in all the nodes using only one newly generated function broadcasted by the key generator entity. The article classifies, analyzes and compares the most significant key distribution schemes, by looking at the selective key distribution algorithms, at the predistributed secret data management, and at the self-healing mechanisms. It reviews polynomial-based algorithms, exponential arithmetic based algorithms, hash-based techniques, and others. Propose classification of schemes based on the applied cryptographic primitives.