Paper 2019/378

pRate: Anonymous Star Rating with Rating Secrecy

Jia Liu and Mark Manulis

Abstract

We introduce pRate, a novel reputation management scheme with strong security and privacy guarantees for the users and their reputation scores. The reputation scores are computed based on the (aggregated) number(s) of stars that users receive from their raters. pRate allows users to advertise privacy-friendly statements about their reputation when searching for potential transaction partners. Ratings can only be submitted by partners who have been initially authorised by the ratee and issued a rating token. The scheme is managed by a possibly untrusted reputation manager who can register users and assist ratees in updating their reputation scores, yet without learning these scores. In addition to ensuring the secrecy of the ratings, a distinctive feature of pRate over prior proposals, is that it hides the identities of raters and ratees from each other during the transaction and rating stages. The scheme is built from a number of efficient cryptographic primitives; its security is formally modeled and proven to hold under widely used assumptions on bilinear groups.

Note: To appear in the 17th International Conference on Applied Cryptography and Network Security (ACNS) 2019.

Metadata
Available format(s)
PDF
Category
Cryptographic protocols
Publication info
Preprint. MAJOR revision.
Keywords
reputation managementstar ratinganonymityrating secrecy
Contact author(s)
jia liu @ thalesgroup com
mark @ manulis eu
History
2019-04-16: received
Short URL
https://ia.cr/2019/378
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2019/378,
      author = {Jia Liu and Mark Manulis},
      title = {{pRate}: Anonymous Star Rating with Rating Secrecy},
      howpublished = {Cryptology {ePrint} Archive, Paper 2019/378},
      year = {2019},
      url = {https://eprint.iacr.org/2019/378}
}
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