Wu Blockchain · 2026-10-13 18:57 UTC

Coinbase, Which Holds About 5% of Existing BTC in Custody, Outlines Bitcoin Post-Quantum Security Recommendations Coinbase, which holds approximately 5% of all existing BTC in custody, outlined technical considerations for Bitcoin’s transition to post-quantum security. The company warned that the migration could take years and urged early preparations. Coinbase suggested exploring flexible output designs such as BIP-360 (P2MR) and P2TRv2, alongside a phased transition supporting both classical and post-quantum signature mechanisms. It also emphasized that questions surrounding dormant funds, lost private keys, and wallets that fail to migrate should be addressed separately to avoid delaying broader post-quantum security upgrades.

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