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Communications in wireless networks has been facilitating numerous emerging applications that require packet delivery from one or more senders to multiple receivers. Communications are susceptible to various kinds of attacks due to insecure wireless channels. Communications in wireless networks remains a challenging and critical issue. This paper presents recent advances in security requirements and services in communications in wireless networks. Wireless networks are being used in many commercial and military applications to collect event driven and real time data. Deployment nature of networks makes them vulnerable to security threats. Due to the resource limitations traditional security measures are not more enough to keep safe the nodes.
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