On March 29th, Ethereum co-founder Vitalik Buterin revealed a comprehensive article, “A simple L2 security and finalization roadmap,” that delineates three pivotal strategies to enhance Ethereum Layer 2 security and finality. The first strategy focuses on scaling data capacity through the forthcoming Pectra upgrade, which aims to elevate Blob space to 6 soon and potentially expand to 72 in the anticipated Fusaka upgrade by year-end, ensuring sufficient throughput for Layer 2 transactions.
Secondly, Buterin proposes a dual-layer hybrid proof system for swift finality, employing a 2/3 multisig method that integrates optimistic proof, ZK proof, and TEE trusted hardware proof. Immediate finality can occur when both ZK and TEE validate concurrently, while a 30-day delay ensures that any necessary emergency upgrades do not compromise security.
Lastly, the roadmap incorporates a unified ZK proof aggregation layer, aimed at standardizing protocols to enable multiple applications to share the single proof cost, significantly minimizing ZK verification overhead and bolstering L2 privacy protocols. This forward-thinking roadmap envisions enhanced L2 cross-chain bridging capabilities and aims to establish a robust, secure, and trustless ecosystem over time.