Secure Key Establishment for Bundle Security Protocol of Space DTNs in Noninteractive manner

Abstract — DTN’s i.e Delay Tolerant Networks are emerging networks that are widely used in the communication field for implementing a more efficient protocol to use the available bandwidth in the network. DTNs are time independent message delivery systems. It is a kind of store and forward. However the security aspects of these networks are of more concerning subject. So to ensure and increase the authenticity, integrity, and confidentiality, the Committee for Space Data Systems bundle security protocol (BSP) specification have suggested four IPsec style security headers to provide four aspects of security services of bundles. But this specification does not involve the issue of key management. Traditionally, protocols tend to provide security services that are used either (or both) on a hop-by-hop or end-to-end basis. For DTN security though, we require that these services be usable also between nodes that are not a source or destination, but which can be in the middle of a route. So this paper aims the key establishment for Bundle protocol. In this paper, the aim is to utilize a time-evolving topology model and two channel cryptography to design an efficient and non-interactive key exchange protocol. A time-evolving model used to model predetermined behaviour of space DTN. So based on that the scheduling is done for public key exchange. And the two-channel cryptography enables DTN nodes to exchange their public keys and status information, with the assurity of authentication and in a non-interactive fashion. The proposed system helps to establish a secure support for BSP, and tolerating high delays, unexpected loss of connectivity of spac