Security & Decentralization on @arbitrum 1/ Arbitrum uses optimistic rollups with fraud proofs, ensuring transactions are secured by Ethereum's massive validator network! 🛡️ 2/ The 7-day challenge period allows anyone to verify transactions and submit fraud proofs if they detect invalid state transitions. 3/ All transaction data is posted to Ethereum mainnet, meaning even if Arbitrum went offline, users could reconstruct the state and recover funds. 4/ The fraud proof system is interactive and multi-round, making it more efficient and harder to attack than single-round proof systems. 5/ Arbitrum has never had a successful attack or exploit of its core protocol since mainnet launch - a testament to its security design. 6/ The network is progressively decentralizing, with plans to transition the sequencer to a decentralized committee controlled by the DAO. 7/ Anyone can run an Arbitrum node to verify transactions independently - you don't have to trust the sequencer, you can verify yourself! 8/ Smart contract risks on deployed protocols are separate from Arbitrum's security - the network itself provides strong guarantees against invalid state transitions. 9/ The use of established Ethereum security primitives means Arbitrum benefits from years of battle-testing and security research. 10/ Arbitrum's open-source codebase has been audited multiple times by leading security firms, with all findings addressed before mainnet launch! Arbitrumeverywhere #web3