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Home/News Feed/Quantum computers could threaten Bitcoin private keys; new hash-based signatures may protect but reduce transaction speed.
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Quantum computers could threaten Bitcoin private keys; new hash-based signatures may protect but reduce transaction speed.

Market News
02 Sep 2026
Bitcoin
View Source
Neutral
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Fidelity Digital Assets warns that future quantum computers could break Bitcoin's current cryptographic protections by deriving private keys from public keys, putting funds at risk. They highlight a proposed hash-based signature system called SHRINCS, which offers quantum resistance but results in larger signatures that could reduce Bitcoin's transaction throughput and complicate wallet recovery. While quantum computers capable of this threat do not yet exist, the research stresses the need for potential upgrades to Bitcoin's security protocols. Implementing such changes would require broad industry support and consensus rule updates.

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