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Coinbase is urging Bitcoin developers and the wider community to start technical work on protections against future quantum-computing threats. The exchange says a transition could take years, but its post is a contribution to discussion, not an agreed upgrade or migration schedule.
Coinbase is urging Bitcoin developers and users to begin preparing for a possible future quantum-computing threat, arguing that changes to the network and migration of funds could take years. The exchange outlined technical priorities in a blog post, but said it was offering input to an open discussion—not announcing an agreed Bitcoin upgrade or a deadline for moving coins.
Coinbase says protecting Bitcoin would involve more than selecting a new digital signature system. Developers would need to weigh security, transaction costs, verification demands and wallet usability, while making changes workable for exchanges and institutional custodians as well as individual users. The company called for evaluating protections for both funds with exposed public keys and newly created funds.
The post identifies P2MR, associated with Bitcoin Improvement Proposal 360, and P2TRv2 as approaches worth examining for flexibility. Coinbase says a design should be able to accommodate different quantum-resistant signature systems over time, avoid vulnerable spending paths and make public keys harder to expose before they are needed. It also says the options should be tested against Bitcoin-specific measures such as transaction size, fees, verification work and migration time.
Coinbase proposed a reproducible evaluation of established standards, candidates still moving through standardization and other credible approaches. Its suggested set includes ML-DSA, SLH-DSA and FN-DSA when standardized, as well as SHRINCS, which the company described as a compact hash-based candidate. These are proposals for evaluation, not systems Coinbase says Bitcoin has selected.
The company also highlighted usability and operational risks. Some signature systems require signers to track which signing steps they have used; Coinbase warns that losing or reusing that state could create security problems. That can be difficult for a wallet owner managing backups and for an exchange running distributed signing systems. The post says blockchain records may not provide a complete way to reconstruct signing history, since a signature or update might never have been recorded on-chain.
Why Bitcoin Needs Time to Prepare
A Bitcoin security change would affect a network whose rules are shared across software, wallets, exchanges and users. If new protections require a coordinated upgrade and people must move funds into new formats, waiting until a quantum capability is demonstrated could leave little time for testing and adoption. Coinbase’s argument is that preparation can begin without claiming the threat is imminent.
The stakes extend beyond choosing cryptography that performs well in isolation. Bitcoin transactions remain in the blockchain and are checked by network participants, so larger signatures or more demanding verification could affect fees and node resources. A design that is difficult for ordinary users to adopt—or that creates risks for custodians—could complicate migration even if its cryptographic properties are attractive.
Coinbase says it holds about 5% of all bitcoin in existence, giving it a significant operational interest in the issue. The company says it is preparing its own systems, talking with developers and researchers, and supporting open-source work through engineering resources and participation in the Bitcoin Security Consortium. Those activities show engagement, but do not establish consensus among Bitcoin stakeholders.
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The Debate Has Two Tracks
Digital signatures allow the Bitcoin network to check that a transaction was authorized by someone with the relevant private key. Public keys are used to verify signatures; private keys provide the authority to spend. Coinbase’s concern is that a sufficiently capable quantum computer might undermine cryptography used by existing signatures, potentially putting some funds at risk. The post does not say such a machine currently exists or give a date for when one might be available.
The company frames the work as both a technical problem and a governance question. Alongside developing and testing protective options, the community must consider what should happen to abandoned or inaccessible coins whose owners may not be able to move them. Coinbase argues those questions deserve debate but should not hold up technical work.
Coinbase also cautions that comparisons from general internet security do not automatically apply to Bitcoin. Bitcoin signatures are retained and verified by network nodes, so evaluations need to reflect how the system actually operates. The post says its recommendations are not a final company position and does not establish a migration plan.
“Some questions, including how to handle abandoned or inaccessible coins, are difficult and deserve thoughtful debate. In our view, that discussion can continue alongside the technical work to add post-quantum signature support to Bitcoin.”
— Coinbase leaders, in the company’s blog post
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No Upgrade or Deadline Set
There is no agreed Bitcoin migration plan or deadline in the material provided, and Coinbase has not identified a quantum computer capable of breaking Bitcoin’s current cryptography. The timing and practical capability of any such threat remain uncertain.
It is also unclear which signature approach, if any, Bitcoin developers and users will favor. The candidates Coinbase lists still require Bitcoin-specific evaluation, and the trade-offs between signature size, verification costs, wallet support and operational safety have not been resolved in the post. The community has yet to settle how funds whose owners cannot or will not migrate should be handled.
Coinbase’s recommendations are the company’s assessment, not evidence of agreement across Bitcoin developers, miners, businesses or users. The post does not specify a formal decision process or say when any proposal could be ready for adoption.
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Evaluation and Community Discussion
Coinbase is calling for continued discussions among developers, researchers and other Bitcoin participants, alongside reproducible testing of candidate signature systems under Bitcoin’s operating conditions. The company says it is preparing its own systems and contributing engineering resources and participation through the Bitcoin Security Consortium.
The next substantive milestones would be technical results that compare security assumptions, transaction and verification costs, wallet integration and migration needs, followed by proposals and discussion through Bitcoin’s development process. No schedule for those steps is specified. Any eventual network change would still require broader evaluation and adoption; the source material does not report that such an upgrade has been approved.
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Key Questions
What is Coinbase asking the Bitcoin community to do?
Coinbase is urging early technical work to evaluate quantum-resistant signature options, alongside discussion of how users and institutions could migrate funds. It has not announced an approved Bitcoin upgrade.
Is a quantum computer currently able to break Bitcoin’s signatures?
The source material does not say that one exists. Coinbase is discussing preparation for a potential future capability; its timing remains uncertain.
Has Bitcoin chosen a post-quantum signature system?
No. Coinbase named several systems and design proposals for evaluation, but the post describes them as candidates to assess, not a selected standard.
What happens to coins whose owners cannot move them?
That question remains unresolved. Coinbase says the treatment of abandoned or inaccessible coins deserves debate, which it believes can proceed alongside technical work.
Did Coinbase set a migration deadline?
No. Coinbase said its post is an input to an open discussion and does not establish a migration deadline or agreed network upgrade.
Source: rss
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