Security is a critical consideration for Layer 2 solutions, and Arbitrum and zkSync implement robust models to ensure network integrity. Arbitrum’s Optimistic Rollup relies on a fraud-proof system where validators can challenge incorrect transactions, ensuring that any fraudulent activity is detected and rectified through a multi-round verification process. This system provides strong security guarantees by leveraging economic incentives to deter malicious behavior. zkSync employs zk-Rollup technology, which uses zero-knowledge proofs to verify the correctness of transaction batches. Each batch is accompanied by a validity proof that is posted on-chain, ensuring that only valid transactions are included. This method offers immediate finality and high security, as the proofs are mathematically verifiable. While both solutions offer strong security models, zkSync’s use of zero-knowledge proofs provides an additional layer of cryptographic assurance, making it extremely difficult for any incorrect transactions to pass through undetected. Arbitrum’s fraud-proof mechanism offers