Data-Efficient Cross-Domain Few-Shot Website Fingerprinting With Unsupervised Domain Adaptation

Website fingerprinting (WF) attacks identify which websites users visit on Tor, a privacy network, but struggle when traffic patterns differ between training and real-world scenarios. This research presents UDA-WF, a new method using unsupervised domain adaptation (a machine learning technique that helps models work across different data distributions) to identify websites more efficiently with less training data. UDA-WF reduces the auxiliary data needed by 95% while maintaining 97.37% accuracy.