Abstract: The delay-tolerant networks are a kind of novel network architecture composed with mobile devices. Recent research has proposed lots of routing protocols for it. However, most of them lack of secure schemes and incentive mechanism. Combining the Spray & Wait routing algorithm, the paper proposes a novel secure scheme and incentive mechanism suitable to the DTN Pub/Sub multicast protocol. By the analysis and simulation, it shows that mechanism can effectively courage the DTN nodes to relay packages for others with Spray & Wait algorithm, and can effectively protect the networking from multiple kinds of attacks such as flooding.

Key words: delay-tolerant networks, incentive mechanism, security protocol, Pub/Sub protocol, Spray &, Wait routing algorithm