Bitcoin’s biggest quantum risk may not be wallet keys. An early investor fears something bigger
A venture capitalist warns that the biggest quantum threat to Bitcoin is not its wallet keys but the encrypted data being transmitted between institutions. This 'harvest now, decrypt later' strategy allows adversaries to collect encrypted messages for future decryption when quantum computers become powerful enough. Experts, including those from Google, are shifting their focus to protect authentication services and digital signatures, which are currently vulnerable.
- ▪Andrew Gault, a venture capitalist, believes the focus on wallet keys is misplaced.
- ▪Adversaries are stockpiling encrypted interbank messages and payment records for future decryption.
- ▪Google has set a target for 2029 to complete its post-quantum cryptography migration.
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TechShareShare this articleCopy linkX iconX (Twitter)LinkedInFacebookEmailBitcoin’s biggest quantum risk may not be wallet keys. An early investor fears something biggerAndrew Gault, the venture capitalist who funded the quantum hardware labs now threatening bitcoin, says the industry is looking in the wrong place. Google's own security team moved in the same direction in March.By Shaurya Malwa May 30, 2026, 5:27 a.m. 3 min readMake preferred on What to know: Security experts warn that the most urgent quantum threat to bitcoin and the broader financial system is not wallet keys but the encrypted authentication data already moving between institutions and being quietly harvested today.Adversaries are pursuing a “harvest now, decrypt later” strategy, stockpiling encrypted interbank…
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