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Coinbase has urged Bitcoin developers and the wider community to begin technical work on protection against future quantum-computing threats. The exchange says the migration could take years, but its post is a contribution to an open discussion, not an agreed upgrade or timetable.
Coinbase is urging early technical preparation for Bitcoin to adopt security against future quantum-computing threats, arguing that changing network rules and moving funds could take years. The exchange’s recommendations call for evaluating candidate signature systems and practical migration needs, but do not set a deadline or establish an agreed Bitcoin upgrade.
In a blog post outlining its technical priorities, Coinbase said preparation should start before a quantum computer capable of breaking the cryptography behind Bitcoin’s existing digital signatures is announced. The company described the work as a complex, multiyear migration involving changes to shared network rules, wallets, exchanges and custody systems. It said it holds about 5% of all bitcoin in existence and is preparing its own systems, speaking with Bitcoin developers and researchers, and supporting open-source work through engineering resources and participation in the Bitcoin Security Consortium.
Coinbase said the task goes beyond choosing a replacement signature algorithm. Bitcoin’s security design must account for funds whose public keys may be exposed, as well as funds created after new protections are introduced. The company recommends evaluating designs that could support different quantum-resistant signature systems over time, while limiting transaction size, fees and verification demands on the network. It pointed to proposals known as P2MR, associated with BIP 360, and P2TRv2 as approaches that appear to offer flexibility; these are candidates for assessment, not confirmed upgrades.
The company called for a reproducible evaluation tailored to Bitcoin, rather than relying only on comparisons designed for general internet security. Its proposed set includes ML-DSA, SLH-DSA and FN-DSA when standardized, along with other candidates such as the hash-based SHRINCS. Coinbase said signature size, verification speed and operating requirements should be measured in Bitcoin’s setting, where signatures are retained and checked by network nodes. It also highlighted the risks of stateful signature systems, which require signers to keep track of signing steps: lost records or reused state could create security problems, including for wallet users and institutions running distributed custody systems.
Why Bitcoin Needs Time to Migrate
The immediate issue is planning time, not a confirmed quantum attack. A change to Bitcoin’s signature rules would need to work across independently operated nodes, wallets, exchanges and custody services. Users may also need to move funds into upgraded formats. If technical choices and migration plans are delayed until a capable quantum computer is announced, Coinbase argues, the ecosystem may have less time to coordinate those changes.
The design tradeoffs affect everyday use as well as network security. Larger signatures could consume more limited transaction space and raise costs; demanding verification could burden nodes. Meanwhile, wallet usability and institutional custody requirements shape whether a proposed protection can be adopted safely. Coinbase’s call to keep work moving is intended to address those practical questions before a crisis, while leaving contentious decisions about old funds to a parallel discussion.
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From Signatures to Network Migration
Bitcoin uses digital signatures to authorize spending: a private key gives its holder spending authority, while a corresponding public key lets the network verify a transaction. Coinbase’s concern is that a sufficiently capable quantum computer could undermine cryptography used by existing signatures, potentially putting some funds at risk. The source material does not say such a computer exists or that Bitcoin’s current security has been broken.
Coinbase’s post frames the matter as an open technical and governance discussion. Its suggested proposal families and evaluation criteria are inputs for developers and researchers, rather than a finalized protocol choice. The exchange also says it is preparing internally and engaging with the community, but a Bitcoin-wide change would require broader technical work and coordination.
“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, in its blog post
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No Upgrade or Deadline Yet
No Bitcoin upgrade has been agreed, and Coinbase did not announce a migration deadline. The post is described as an input to an open discussion, not a final company position. It remains unclear which signature system, address format or migration method developers might ultimately favor, and whether the candidate designs identified by Coinbase will meet Bitcoin’s security and operational needs.
The scale and timing of any future quantum threat are also unresolved in the supplied material. Questions about funds whose owners cannot or will not move them remain open, as do the specific costs and implementation timelines for proposed protections. Coinbase’s recommendations do not establish that exposed funds are currently under attack.
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Testing Candidates and Coordinating Work
Coinbase is calling for continued evaluation of signature candidates against Bitcoin-specific measures, including transaction size, fees, verification work and the time needed to migrate vulnerable funds. The company says it is preparing its systems and engaging with developers and researchers; its support for open-source work includes participation in the Bitcoin Security Consortium.
The next milestones depend on research and community discussion rather than a schedule announced by Coinbase. Developers would need to assess proposed designs, determine how wallets and custody providers could support them, and address governance questions about inaccessible coins. The company’s stated position is that those debates can proceed alongside technical work, but what Bitcoin’s wider community will decide remains unknown.
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Key Questions
What is Coinbase asking Bitcoin to do?
Coinbase is urging developers and the wider community to begin evaluating quantum-resistant signature protections and the practical requirements for migrating Bitcoin funds and systems.
Has Bitcoin approved a post-quantum upgrade?
No. Coinbase describes its post as an input to an open discussion. It does not announce an agreed protocol change or deadline.
Is a quantum computer currently breaking Bitcoin signatures?
The supplied report does not say that such a computer exists or that Bitcoin’s cryptography has been broken. Coinbase is recommending preparation for a potential future threat.
Why does the migration need advance planning?
A transition could require changes to Bitcoin’s rules and adoption by wallets, exchanges, custody providers and users. Coinbase says that coordination and movement of funds could take years.
What remains undecided about inaccessible bitcoin?
The community has not resolved how to handle abandoned or inaccessible funds. Coinbase says that question deserves debate but can be discussed alongside technical preparation.
Source: rss
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