Odaily Planet Daily News: The open source L2 data analysis website L2BEAT recently published an article expressing the hope to introduce a risk framework designed to evaluate the security of data availability (DA) solutions. From the perspective of Ethereum, the security assumptions of external DA providers depend not only on the intrinsic characteristics of the DA solution itself, but also on how its security properties match the data proofs published to the DA bridge on Ethereum. -Economic security measures the degree of trust people have in the majority consensus, that is, how much money a committee needs to consume to successfully deceive the DA bridge. -The fraud detection mechanism category measures the effectiveness of users' self-protection in the face of malicious majority members of the committee (such as validators). -Proof security evaluates the ability of the DA bridge to verify data commitments without introducing additional trust assumptions. -The exit window standard examines the upgradeability of the DA bridge, with a particular focus on the withdrawal mechanism and the time when users are allowed to exit when upgrading. -Accessibility measures the convenience of accessing data directly from the Ethereum network. This category distinguishes between DA solutions that are integrated into the Ethereum protocol (confirmed) and those that are not integrated into it. This risk category applies only to Ethereum L2, not to sovereign Rollups that use the DA layer independently.