In a recent event in Singapore, Vitalik Buterin expressed concerns about Ethereum's network security. He pointed out vulnerabilities that solo stakers, the first and last line of defense in securing the network, face from subtle and indirect attacks. Buterin warned about the possibility of a 67% capture attack, which could allow attackers to control the majority of staked ETH and manipulate the blockchain without penalties. One potential solution could be increasing the quorum threshold, but Buterin cautioned that it could make the network susceptible to new vulnerabilities. He also highlighted that there are cheaper options for attackers, such as bribing core developers or big node operators. To enhance security, Buterin suggested the need for more solo stakers to act as a critical quorum-blocking set.



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