Blending Different Latency Traffic with Alpha-Mixing
NAVAL RESEARCH LAB WASHINGTON DC
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Currently fielded anonymous communication systems either introduce too much delay and thus have few users and little security or have many users but too little delay to provide protection against large attackers. By combining the user bases into the same network, and ensuring that all traffic is mixed together, we hope to lower delay and improve anonymity for both sets of users. Alpha-mixing is an approach that can be added to traditional batching strategies to let senders specify for each message whether they prefer security or speed. Here we describe how to add alpha-mixing to various mix designs, and show that mix networks with this feature can provide increased anonymity for all senders in the network. Along the way we encounter subtle issues to do with the attackers knowledge of the security parameters of the users.
- Computer Systems Management and Standards