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Visual surveillance has numerous applications. It can support public safety, traffic monitoring, and facility protection to name just a few. Networked digital surveillance devices are revolutionizing the surveillance industry by supporting high quality images, remote monitoring, and advanced image processing. However, they also raise serious privacy/security concerns. To address the issue, the surveillance industry has recently begun to provide basic support for secure communications. In this paper, we present a new protocol to significantly enhance the security and performance compared with the state-of-the-art baseline method widely taken in the video surveillance industry. Through extensive experiments for performance evaluation, our approach is shown to substantially reduce the delay to execute cryptographic mechanisms and increase the supported bit rate compared with the baseline, while providing …