In a new blog post on Wednesday, Ethereum co-founder Vitalik Buterin detailed a proposal for "enshrining" a zero-knowledge Ethereum Virtual Machine (ZK-EVM) into the Ethereum blockchain, in large part to improve the security and speed of verifying transactions. 

Enshrining, in the context of development of the Ethereum blockchain, refers to the integration of a new feature directly into the fundamental code of the chain. 

An enshrined ZK-EVM would seek to internalize the EVM verification methods currently used by layer 2 solutions, such as optimistic and ZK-rollups. These solutions have typically relied on large external codebases, which may present security vulnerabilities.