AKCSS: An Asymmetric Key Cryptography Based on Secret Sharing in Mobile Ad Hoc Network

摘要

In Mobile Ad hoc Network (MANET), mobile nodes are especially prone to the security threats of eavesdropping, interception, denial-of-service and routing attacks. Some of these problems may be solved with the use of cryptographic protocols. In the recent literature many works make specific proposals on how to use well-known cryptographic techniques to secure MANETs. But these are relies keys for encryption and decryption. For decryption, keys must be shared from source to destination. But secret key sharing in MANET is computationally unsafe and inconsistent due to its dynamic nature. To tackle this problem, this paper proposed an Asymmetric Key Cryptography based on Secret Sharing (AKCSS) Algorithm. This algorithm provides two types of security. One is Secret Sharing, another one is Secure Communication. For Secret Sharing, AKCSS algorithm splits secret key into N shares and transmits each share through different paths from source to destination. For reduce nodes energy consumption, minimum cost routing paths are taken. After receive each share, the destination node can reconstruct secret key. To secure communication, source node encrypts its message with public key which provides cipher text and forwards it via Minimum Cost Routing Path (MCRP). For message transmission from source to destination, MCRP can reduce energy consumption. After receive cipher text, destination node can decrypt using secret key. Experimental results demonstrate that the proposed protocol provides strong security for secret sharing and message transmission. Furthermore, it reduces energy consumption efficiently.