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This paper deals with the design principles and implementation of a reconfigurable real-time software platform designed for data exchange between software modules of unmanned underwater and surface vehicles. The aim of developing a new robotic platform was the realization of a light-weight OS-independent library that allows integrating AUVs, ROVs and surface vehicles to a single computing cluster...
Vehicular Ad-hoc Network (VANET) is a type of mobile communication in which topology changes dynamically due to high mobility of vehicles. Vehicles use two types of messages to update their status and to communicate with other vehicles. First is Periodic Safety Message (PSM) which gives us information about position, speed etc. and second is Event Driven Safety Message (ESM) which occurs when emergency...
In order to solve the communication conflict of the mine personnel positioning system, clustering protocol is employed, in which the node receiving the strongest signal is selected as the new head of the cluster and the members are selected based on the method of RSSI similarity and neighbor node K. Simulation on clustering protocol was performed using the software MATLAB. It indicated that the speed...
The popularity of community-centric applications has rapidly grown during the recent years. In this paper, we evaluate the robustness of a P2P community management system, where communities are established as autonomous DHT overlays that are advertised in a global DHT overlay. The evaluation is based on the experimental measurements conducted using a DHT-based protocol with two DHT algorithms called...
Delay Tolerant Network (DTN) is a network in which end-to-end connectivity may not be guaranteed because of the frequent and long duration partitions. SMART routing, which is a selective controlled-flooding scheme, utilizes travel companions of the destinations and improves the delivery opportunities, but its flooding overhead can be further controlled. In this paper, we propose A-SMART routing which...
This paper presents a mechanism to manage a dynamic group in an automatic way for sending Group IM (instant message) based on presence service in IMS system. Presence technology is gaining significant interest nowadays. It can show the user's presence information in real time. Presence based services are driving new business opportunities and changing every aspect of our daily life, especially in...
Password-based authenticated group key exchange protocols allow group users to jointly share a session key based on a human-memorizable password. In this paper, we present an undetectable online dictionary attack on N-EKE-D, a recent provably secure protocol designed to explicitly resist this type of attack. Thus, our result contradicts the design goal. We also give a simple attack on the key indistinguishability...
When humans interact with machines in their daily networks, it is important that security of the communications is offered, and where the involved shared secrets used to achieve this are easily remembered by humans. Password-based authenticated group key exchange (PAGKE) schemes allow group users to share a session key based on a human-memorizable password. In this paper, we consider two PAGKE schemes...
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