Mr. Yangxin Liu Profile

Yangxin Liu

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Proceedings Article | 7 October 2016 Paper

A network monitor for HTTPS protocol based on proxy

Yangxin Liu, Lingcui Zhang, Shuguang Zhou, Fenghua Li

Proceedings Volume 9902, 99020S (2016) https://doi.org/10.1117/12.2261978

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With the explosive growth of harmful Internet information such as pornography, violence, and hate messages, network monitoring is essential. Traditional network monitors is based mainly on bypass monitoring. However, we can’t filter network traffic using bypass monitoring. Meanwhile, only few studies focus on the network monitoring for HTTPS protocol. That is because HTTPS data is in the encrypted traffic, which makes it difficult to monitor. This paper proposes a network monitor for HTTPS protocol based on proxy. We adopt OpenSSL to establish TLS secure tunes between clients and servers. Epoll is used to handle a large number of concurrent client connections. We also adopt Knuth- Morris-Pratt string searching algorithm (or KMP algorithm) to speed up the search process. Besides, we modify request packets to reduce the risk of errors and modify response packets to improve security. Experiments show that our proxy can monitor the content of all tested HTTPS websites efficiently with little loss of network performance.

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