Mitigating Denial of Service Attacks in Delay-and Disruption-Tolerant Networks

There is a growing interest in providing communications to “Challenged” environments which have been hitherto isolated and disconnected due to the lack of communications infrastructure. These are regions which lie at the edge of the current Internet. Confidentiality, integrity and availability are the three major security requirements of any secured system or network. This paper presents our work on Denial of Service mitigation in Delay-and DisruptionTolerant Networks. We propose three examples of a light-weight bundle authenticator (DTN-cookie) based on XOR and HMAC operations to thwart DoS attacks that lead to resource exhaustion.