A sybil-proof referral system based on multiplicative reputation chains

G. Kesidis, A. Tangpong, C. Griffin

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Transactions between peers in social networks generate direct reputation (social capital) information. This can be augmented with indirect referrals, on demand or continually, thus giving peers additional information prior to engaging in transactions with others. Despite proposed deterrents such as identity acquisition costs, false referrals through sybil identities pose a significant threat. In this note, we show how a reputation system which multiplicatively chains referrals, and adds referrals from different referral paths/chains, is sybil-proof.

Original languageEnglish (US)
Article number5337068
Pages (from-to)862-864
Number of pages3
JournalIEEE Communications Letters
Issue number11
StatePublished - Nov 2009

All Science Journal Classification (ASJC) codes

  • Modeling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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