When discussing L2 security, Optimistic Rollups and ZK-Rollups in the Ethereum ecosystem are the gold standard. However, the BitVM-based security paradigm adopted by Bitlayer represents a completely different yet equally powerful security philosophy, rooted in Bitcoin's minimalism and maximized trustlessness.

The core idea of Ethereum Rollups is to 'move computation off-chain and place data (or proofs) on-chain.' Whether it’s the Optimistic Rollups that rely on fraud proofs or the ZK-Rollups that rely on validity proofs, they all regard the Ethereum mainnet as the final 'data availability layer' and 'arbitration court.' The security of this model heavily relies on Ethereum's strong smart contract execution capabilities.

In contrast, Bitlayer's BitVM paradigm faces a more severe challenge: how to verify L2 states on Bitcoin, which does not support complex smart contracts in its scripting system? The genius of BitVM lies in its ability to break down complex computations into the most basic true-or-false questions that can be verified on Bitcoin scripts through a series of clever cryptographic designs (such as hash locks, time locks, etc.).

The fundamental difference between these two philosophies is that Ethereum Rollups are built on the basis of 'trusting smart contracts,' while Bitlayer is built on 'trusting almost nothing, only trusting the most basic operations of Bitcoin scripts.' This makes Bitlayer's security model theoretically closer to the 'trustless' spirit core of Bitcoin; although the path to implementation is more convoluted, once successful, the security moat it establishes will be exceptionally robust. @BitlayerLabs #Bitlayer