A high-bandwidth, low-latency system for anonymous broadcasting
Name
1192486920-MIT.pdf
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314.03 KB
Format
Adobe PDF
Checksum (MD5)
1d3eae102edf2f035e68bf0b67383eb5
Author(s)
Newman, Zachary James.
Advisor(s)
Srini Devadas.
Date Issued
2020
Publisher
Massachusetts Institute of Technology
Abstract
In this thesis,1 we design and evaluate Spectrum, a system for bandwidth efficient, anonymous broadcasting. In this system, one (or more) publishers broadcast a message to many users, who provide cover traffic. These users share their message between two or more servers; as long as one of these is honest, even an adversary with a complete view of the network cannot discover a message's source. Prior systems require that each user publish a message; however, streaming media tends to have many consumers for every content producer. We take advantage of this for a large performance improvement. To do so, we provide a cryptographic solution to the disruption problem, where dishonest users can corrupt a message by writing noise. This solution provides access control for operations performed obliviously by the servers. Spectrum is 60x faster than prior work for moderate-sized messages (10 kB), Each client uploads under 1 kB of additional data to broadcast a message of any size. Using a two-server deployment, Spectrum is fast enough to broadcast 3.4 GB/h to 600 users or streaming video to 5,000 users. Further, we can shard Spectrum across many physical servers for commensurate speedup, scaling a given workload to many more users.
Description
Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, May, 2020
Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 55-59).
Subjects
Electrical Engineering and Computer Science.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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