Security Flaws in Old Bitcoin Wallets May Expose Millions to Hackers
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Older Bitcoin wallets (pre-2016) may have security flaws that leave private keys vulnerable to hackers.
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The flaws originate from weak random number generators used in some open-source wallet software.
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One software package called BitcoinJS was used by many popular crypto websites and contains the flaws.
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Millions of wallets may be affected, with pre-2012 wallets being especially at risk.
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Users can check if their wallet is vulnerable at keybleed.com, but many affected users may be unreachable if their provider shut down.