#Arbitrum

Offchain Labs, the Arbitrum development team, is developing a defense mechanism titled "Add Relay Client Connection Nonces" to prevent MEV seekers from performing Sybil attacks on sequencers. This mechanism requires that the random number must be unique between different clients. The relay will broadcast messages to clients in order from high to low random number target values. The client with the highest random number target value will be the fastest. Received the news. If two connections have the same nonce target value, the client with the lower random hash value will receive the broadcast first and then propagate it to other relays.