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Groups of people with mobile phones using short range connections like WiFi and Bluetooth to propagate messages can be modeled as, with regard to regular absence of end-to-end connection, Delay Tolerant Networks (DTNs). The study of message transmission speed in such kind of networks has attracted increasing attention in recent years. In this paper, we present a realistic framework to model the message...
Owing to the uncertainty of transmission opportunities between mobile nodes, the routing in delay-tolerant networks (DTNs) exploits the mechanism of opportunistic forwarding. Energy-efficient algorithms and policies for DTN are crucial to maximizing the message delivery probability while reducing the delivery cost. In this contribution, we investigate the problem of energy-efficient optimal beaconing...
MANET, within which nodes can move arbitrarily, is a self-organized network without fixed infrastructure. However, due to the lack of infrastructure, limited resources and vulnerability of wireless links, security in mobile ad hoc networks is considered to be much more difficult than in traditional wired networks. Building trust relationships between each node can effectively improve the network security...
Threshold signature schemes are useful in MANET because of the mobility and weak connectivity. Meanwhile, order-specified multi-signature schemes are valuable in some multi-level security systems. To meet such kind of requirements, we proposed a secure threshold order-specified multi-signature scheme based on RSA in this paper. The scheme is designed based on a modified threshold RSA signature scheme...
The (t, n) threshold cryptography is an important method for sharing a group secret message in dynamic groups such as ad hoc groups. Using subliminal channel, one can send a secret message to an authorized receiver and the message cannot be discovered by any unauthorized receivers; it satisfies different requirements of different kind of users. We discussed the security of HCW scheme and proposed...
A mobile ad hoc network (MANET) is a dynamically reconfigurable wireless network that does not have a fixed infrastructure. Due to the high mobility of nodes, the network topology of MANETs changes very fast, making it more difficult to find the routes that message packets use. Because mobile nodes have limited battery power, it is therefore very important to use energy in a MANET efficiently. In...
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