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Quantum computing may threaten Bitcoin ownership proof by breaking signing authority link.

Protocol Fundamentals
24 Oct 2026
Tokenpost
View Source
Neutral
Quantum computing may threaten Bitcoin ownership proof by breaking signing authority link.

An anonymous Coinbase cryptography head warned that quantum computing could disrupt the link between signing authority and Bitcoin ownership, meaning someone able to sign a transaction might not be the actual owner. This challenges the fundamental principle that control of signing keys equals ownership. Coinbase is preparing for this risk by exploring post-quantum signature options for Bitcoin, aiming for a flexible transition that could take years to implement.

Quantum computing risks to Bitcoin ownership models come amid a market where only 5 of 50 major cryptocurrencies traded on Pluang rose today. For readers following cryptocurrency trends, here is Pluang's market snapshot as of Oct 25, 2026 07:21 WIB: AXS (Axie Infinity) fell 4.78% to Rp17.103 with 68% of orders selling and a typical hold time of 63 days; EGLD (MultiversX) dropped 4.41% to Rp59.636 with a 44% sell order ratio and 86 days hold time; ONE (Harmony) declined 4.35% to Rp24 with 37% sell orders and a typical hold time of 153 days.

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