Coinbase maps out Bitcoin's path to quantum-resistant security
Tech & Launches ·
The exchange, which custodies about 5% of all existing BTC, published technical recommendations for shifting Bitcoin to post-quantum cryptography.
Coinbase said the migration to quantum-resistant signatures could take years to complete and urged the network to begin preparations now rather than waiting for quantum computing threats to materialize, a point echoed in reporting from Decrypt. The exchange's custody share of roughly 5% of circulating BTC gives its position added weight in discussions about how any transition would be coordinated across the network, according to WuBlockchain.
On the technical side, Coinbase pointed to flexible output designs — including BIP-360, also known as P2MR, and P2TRv2 — as candidate mechanisms for supporting new signature schemes without disrupting existing wallet infrastructure. The company favored a phased approach that would let classical and post-quantum signatures coexist during the transition, rather than a single abrupt cutover, a structure detailed further by The Block.
Coinbase separately flagged a set of harder governance questions tied to the migration: how to handle dormant funds, coins tied to lost private keys, and wallets that never upgrade to post-quantum signatures. The company argued these issues should be dealt with independently of the core cryptographic upgrade, warning that folding them into the same process risked delaying the broader security transition for the entire network.
The recommendations have drawn attention from multiple outlets covering the same announcement, with at least four distinct sources reporting on Coinbase's proposals, underscoring the recommendations as a notable entry in the ongoing industry conversation about Bitcoin's long-term cryptographic resilience rather than an isolated technical memo.
What remains unresolved is how and when Bitcoin's developer community and broader network participants might formally adopt proposals like BIP-360 or P2TRv2, and what mechanism — if any — would eventually address dormant or unmigrated funds without stalling the rest of the upgrade. Coinbase's own timeline references a multi-year process, but no fixed schedule or consensus path has been established.