Paper 2021/1514
Clarion: Anonymous Communication from Multiparty Shuffling Protocols
Abstract
This paper studies the role of multiparty shuffling protocols in enabling more efficient metadata-hiding communication. We show that the process of shuffling messages can be expedited by having servers collaboratively shuffle and verify secret-shares of messages instead of using a conventional mixnet approach where servers take turns performing independent verifiable shuffles of user messages. We apply this technique to achieve both practical and asymptotic improvements in anonymous broadcast and messaging systems. We first show how to build a three server anonymous broadcast scheme, secure against one malicious server, that relies only on symmetric cryptography. Next, we adapt our three server broadcast scheme to a
Metadata
- Available format(s)
-
PDF
- Category
- Cryptographic protocols
- Publication info
- Published elsewhere. NDSS 2022
- Keywords
- anonymous communicationmetadata-hiding communication
- Contact author(s)
- saba @ cs unc edu
- History
- 2023-02-13: last of 2 revisions
- 2021-11-20: received
- See all versions
- Short URL
- https://ia.cr/2021/1514
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2021/1514, author = {Saba Eskandarian and Dan Boneh}, title = {Clarion: Anonymous Communication from Multiparty Shuffling Protocols}, howpublished = {Cryptology {ePrint} Archive, Paper 2021/1514}, year = {2021}, url = {https://eprint.iacr.org/2021/1514} }