Acta Polytechnica Hungarica Vol. 8, No. 6, 2011 – 191 – Secure Unicast Position-based Routing Protocols for Ad-Hoc Networks Liana Khamis Qabajeh, Miss Laiha Mat Kiah Faculty of Computer Science and Information Technology University of Malaya 58200 Kuala Lumpur, Malaysia liana_tamimi@ppu.edu; misslaiha@um.edu.my Mohammad Moustafa Qabajeh Department of Electrical and Computer Engineering International Islamic University Malaysia 58200 Kuala Lumpur, Malaysia m_qabajeh@yahoo.com Abstract: Ad-Hoc networks are decentralized wireless networks. A fundamental problem in Ad-Hoc networks is finding a secure and correct route between a source and a destination efficiently. The need for scalable and energy efficient routing protocols, along with the availability of small, inexpensive and low power positioning instruments, results in making position-based routing protocols a promising choice for mobile Ad-Hoc networks. This paper presents an extensive overview of the existing Ad-Hoc unicast routing protocols that make forwarding decisions based on the geographical position of the destination of a packet, while keeping security issues in mind. We outline the main problems for this class of routing protocols and a qualitative comparison of the existing protocols is done in regards to both security and performance issues. We conclude our work by investigating some future research opportunities. Keywords: secure, unicast, position-based routing, location-aware routing, ad-hoc networks, wireless networks, routing protocols 1 Introduction An Ad-Hoc network is considered as a very particular network since it is a self- organizing network with no pre-deployed infrastructure and no centralized control; instead, nodes carry out basic networking functions like routing. With this flexibility, Ad-Hoc networks have the ability to be formed anywhere and at any