On Secrecy Capacity Scaling in Wireless Networks

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The broadcast nature of the wireless communication makes it susceptible to eavesdropping. This motivates considering secrecy as a Quality of Service (QoS) constraint that must be accounted for in the network design. The scaling laws of wireless networks under the assumption of pre-distributed private keys was studied in. However, it is important to note that, the key agreement step of the cryptographic protocols is arguably the most challenging part and this step becomes even more daunting as the network size grows. The work avoids these limitations by adopting an information theoretic framework for secrecy in wireless networks.