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arXiv · 2006.00097

Programmable In-Network Obfuscation of Traffic

Liang Wang·Hyojoon Kim·Prateek Mittal·Jennifer Rexford
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Abstract

Recent advances in programmable switch hardware offer a fresh opportunity to protect user privacy. This paper presents PINOT, a lightweight in-network anonymity solution that runs at line rate within the memory and processing constraints of hardware switches. PINOT encrypts a client's IPv4 address with an efficient encryption scheme to hide the address from downstream ASes and the destination server. PINOT is readily deployable, requiring no end-user software or cooperation from networks other than the trusted network where it runs. We implement a PINOT prototype on the Barefoot Tofino switch, deploy PINOT in a campus network, and present results on protecting user identity against public DNS, NTP, and WireGuard VPN services.

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Liang Wang, Hyojoon Kim, Prateek Mittal, Jennifer Rexford. 2020-05-29. Programmable In-Network Obfuscation of Traffic. https://arxiv.org/abs/2006.00097

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