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Multi-agent consensus under jamming attacks is investigated. Specifically,inter-agent communications over a network are assumed to fail at certain timesdue to jamming of transmissions by a malicious attacker. A new stochasticcommunication protocol is proposed to achieve finite-time practical consensusbetween agents. In this protocol, communication attempt times of agents arerandomized and unknown by the attacker until after the agents make theircommunication attempts. Through a probabilistic analysis, we show that theproposed communication protocol, when combined with a stochastic ternarycontrol law, allows agents to achieve consensus regardless of the frequency ofattacks. We demonstrate the efficacy of our results by considering twodifferent strategies of the jamming attacker: a deterministic attack strategyand a more malicious communication-aware attack strategy.

Randomized Transmission Protocols for Protection against Jamming Attacks in Multi-Agent Consensus