A New Cell-Counting-Based Attack Against Tor

Provided by: Institute of Electrical & Electronic Engineers
Topic: Security
Format: PDF
Various low-latency anonymous communication systems such as Tor and Anonymizer have been designed to provide anonymity service for users. In order to hide the communication of users, most of the anonymity systems pack the application data into equal-sized cells (e.g., 512 B for Tor, a known real-world, circuit-based, low-latency anonymous communication network). Via extensive experiments on Tor, the authors found that the size of IP packets in the Tor network can be very dynamic because a cell is an application concept and the IP layer may repack cells.

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