Ethereum closed a big security hole with its energy-saving update

Ethereum, the world’s second-largest cryptocurrency, slashed its vitality use with a significant change to the way it works final yr. Safety specialists say the replace additionally unknowingly sidestepped a critical safety flaw that would have allowed hackers to steal funds. Nonetheless, at the very least one cryptocurrency that “forked” from Ethereum by copying its code remains to be in danger.

Ethereum used to depend on “proof of labor” to safe its community, as bitcoin nonetheless does, that means that computer systems carried out enormous numbers of calculations to “mine” new foreign money and …