In this paper, we study the data inconsistency problem in data broadcast to mobile transactions. While data items in a mobile computing system are being broadcast, update transactions may install new values for the data items. If the executions of update transactions and broadcast of data items are interleaved without any control, the transactions generated by mobile clients, called mobile tran...

Considering the limited resources and the dynamic spectrum distribution in the cognitive radio sensor networks (CRSN), a half-duplex Multichannel broadcast protocol for CRSN is presented based on the home channel. This protocol maintains the networks topology only through the home channel, so there is no need for the public channel to transmit the control information and no need for the synchro...

Because adaptability greatly improves the performance of a broadcast protocol, we identify three ways in which machine learning can be applied to broadcasting in a mobile ad hoc network (MANET). We chose broadcasting because it functions as a foundation of MANET communication. Unicast, multicast, and geocast protocols utilize broadcasting as a building block, providing important control and rou...

A consensus protocol enables a system of n asynchronous processes, some of them faulty, to reach agreement. Both the processes and the message system are capable of cooperating to prevent the correct processes from reaching decision. A protocol is t-resilient if in the presence of up to t faulty processes it reaches agreement with probability 1. Byzantine processes are faulty processes that can...

Title of dissertation: BROADCAST AND VERIFIABLE SECRET SHARING: NEW SECURITY MODELS AND ROUND-OPTIMAL CONSTRUCTIONS Ranjit Kumaresan, Doctor of Philosophy, 2012 Dissertation directed by: Professor Jonathan Katz Department of Computer Science Broadcast and verifiable secret sharing (VSS) are central building blocks for secure multi-party computation. These protocols are required to be resilient ...

A wireless broadcast environment is defined as a mobile computing environment in which data are delivered to mobile clients by means of a broadcast-based mechanism. Of course, those applications have to see the most recent consistent database state. For that reason, in such a scenario, database servers should synchronize operations for ensuring data consistency and currency of data. However, co...

This paper presents a HiPO (High-sPeed Orderpreserving broadcast) protocol which provides highthroughput group communication service on a highspeed single channel network like FDDI. By the HiPO protocol, every application entity can atomically receive all the messages broadcast in the group in the same order as they were sent. This service is an OP (orderpreserving broadcast) one. The execution...

Based on existing reliable broadcast protocols in MANETs, we propose a novel reliable broadcast protocol that uses clustering technique and gossip methodology. We combine local retransmission and gossip mechanisms to provide reliability in MANETs. The proposed protocol can dynamically change system parameters for reliable broadcast communication in order to improve the adaptability in the rapid...

Saving human life is the most important task than anything else. Day to day life faces loss of life due to accidents which can be avoided. Biologically inspired communication on road could save lots of life. A mesh sensor which is developed based on a combination of mesh router and wireless sensor can be used for communication between vehicles in a better way and could save human life. Vehicula...

Motivated by the recent success of Bitcoin we study the question of constructing distributed cryptographic protocols in a fully peer-to-peer scenario under the assumption that the adversary has limited computing power and there is no trusted setup (like PKI, or an unpredictable beacon). We propose a formal model for this scenario and then we construct a broadcast protocol in it. This protocol i...