Google's Willow chip raises quantum threat concerns for early bitcoin wallets

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Google says its Willow quantum chip can prepare the special quantum states required for advanced computations with roughly 40 times fewer errors than before. This reduces a key hardware obstacle that would stand in the way of any future effort to break into bitcoin wallets. The development has drawn attention to the potential risk facing older, Satoshi-era bitcoin holdings. The source frames the improvement as a step that lowers one barrier, rather than a demonstrated attack on bitcoin itself.

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