The security expert said that while PoS isn’t “theoretically” as secure as PoW, he admits it still has “sufficient practical security.”
Despite the Ethereum Merge being linked as a major upgrade to the blockchain network, its transition to proof-of-stake theoretically makes it more vulnerable to exploit.
Speaking to Cointelegraph, the security researcher explained that unlike proof-of-work (PoW) systems, a proof-of-stake (PoS) system informs node validators in advance what blocks they will validate, thus enabling them to plan attacks.
The security expert, who asked not to be named, is a blockchain developer and security researcher working on a proof-of-stake layer-2 blockchain.

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