Abstract
Many trust establishment solutions in mobile ad hoc networks (MANETs) rely on public key certificates. Therefore, they should be accompanied by an efficient mechanism for certificate revocation and validation. Ad hoc distributed OCSP for trust (ADOPT) is a lightweight, distributed, on-demand scheme based on cached OCSP responses, which provides certificate status information to the nodes of a MANET. In this paper we discuss the ADOPT scheme and issues on its deployment over MANETs. We present some possible threats to ADOPT and suggest the use of a trust assessment and establishment framework, named ad hoc trust framework (ATF), to support ADOPT's robustness and efficiency. ADOPT is deployed as a trust-aware application that provides feedback to ATF, which calculates the trustworthiness of the peer nodes' functions and helps ADOPT to improve its performance by rapidly locating valid certificate status information. Moreover, we introduce the TrustSpan algorithm to reduce the overhead that ATF produces, and the TrustPath algorithm to identify and use trusted routes for propagating sensitive information, such as third parties' accusations. Simulation results show that ATF adds limited overhead compared to its efficiency in detecting and isolating malicious and selfish nodes. ADOPT's reliability is increased, since it can rapidly locate a legitimate response by using information provided by ATF.
Highlights
Mobile ad hoc networks (MANETs) are dynamically configured, multihop wireless networks with varying topology
In a prototype simulation implementation of the Ad hoc distributed OCSP for trust (ADOPT) and ad hoc trust framework (ATF) schemes, we have evaluated the performance of the integrated scheme, using the J-SIM wireless package simulator [22]
In this paper we discussed the integration of a trust assessment framework, ATF, with ADOPT, a distributed OCSP deployment for MANETs
Summary
Mobile ad hoc networks (MANETs) are dynamically configured, multihop wireless networks with varying topology. If the primary goal is the maximization of the network’s availability, robustness, and overall throughput, cooperation enforcement schemes fit better They mainly encourage the collaboration between the nodes of a MANET, trying to overcome egoistic behaviors that jeopardize the network’s operation. In [5] we EURASIP Journal on Wireless Communications and Networking have proposed a distributed scheme based on OCSP (online certificate status protocol) called ADOPT, that can provide on demand up-to-date CSI to any node in a MANET. On the other hand, when the availability of nodes and network, and the overall throughput are required, the cooperation enforcement techniques might fit better These models face mainly the question of encouragement of collaboration between the nodes of a MANET so that the right implementation of routing and forwarding tasks is achieved. Its purpose is to create a fast, light, distributed, and always available certificate revocation protocol for MANETs
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