Due to the resource constraints on sensor networks, many recent key management schemes exploit the location of nodes in order to establish pairwise keys. Despite these efforts, location discovery for sensor networks is very difficult, because existing schemes have failed to consider changes in the signal range and the deployment error. As a result, network performance may accidentally decrease,...

In this paper, we treat the entity authentication and subsequent key distribution problem in order to enhance multiple-entity (group of entities) communications with confidentiality and integrity services. We first give a summary of the existing methods to solve the key distribution problem. After this introduction of some known methods, we propose a different one, which detailed description wi...

We propose the adaptive multicarrier quadrature division–multiuser quadrature allocation (AMQD-MQA) multiple access technique for continuous-variable quantum key distribution (CVQKD). The MQA scheme is based on the AMQD modulation, which granulates the inputs of the users into Gaussian subcarrier continuous-variables (CVs). The subcarrier coherent states formulate Gaussian sub-channels from the...

Among all security issues, key management is the most attractive mechanism to ensure security of applications and network services in Wireless Sensor Networks (WSNs). Key management includes two important aspects namely: Key distribution, which constitutes the task of distributing secret keys to nodes in the network and Key revocation, which refers to the task of securely withdrawing the key in...

abstract background: the pressure of consumption spots in eater supply systems is one of the most important hydraulic parameters can be used in optimized management of water distribution networks. since the pressure has some different effects on various parameters of the network management including its hydraulic functions, reliability, stability and leakage, its control is of great importance ...