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Working Group Security and Incentives

This paper explores the vulnerabilities of gossip protocols in distributed systems and the implications of hidden assumptions on security. It emphasizes the need for deeper research to understand the impact of violating these assumptions and changing protocols, focusing on Byzantine and rational behaviors, and the effects of churn.

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Working Group Security and Incentives

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  1. Working GroupSecurity and Incentives Robbert van Renesse Jeroen Doumen Gilles Tredan Harry Li Rachid Guerraoui Lorenzo Alvisi Boris Koldehofe

  2. Gossip is not robust! • given and hidden assumptions • are exploitable to attackers • non-robustness may be caused by • Failing processes • Unexpected behaviour • Environment • Global warming • properties that may be violated • availability • connectivity • convergence properties • time it takes to converge

  3. Gossip may be robust … • only if we assume • Synchrony • limited churn • full independent connectivity • Randomness • Discovery • sufficient memory

  4. Better understanding needed • Stop defining gossip, do research! • Only 8 security related papers on gossip • Unclear how gossip behaves • if we violate assumptions • if we change the protocol • Research topics • Byzantine and rational behaviour • Impact of churn

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