Wu Shuo learned that Vitalik has published an article explaining the security model evolution strategy of Ethereum Rollup. The three stages of Ethereum Rollup security (Stage 0, 1, 2) are defined based on whether the security committee can cover a trustless proof system: Stage 0 requires complete control by the security committee, Stage 1 requires 75% (at least 6/8) consent and at least 3 people from external sources, Stage 2