MORGANABLE BUSINESS / MARKETS
Coinbase has urged the Bitcoin community to begin preparing for the potential threat posed by quantum computers, warning that protecting the network could require years of technical work and coordination.
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Coinbase has urged the Bitcoin community to begin preparing for the potential threat posed by quantum computers, warning that protecting the network could require years of technical work and coordination.
In a position paper published on October 13, the cryptocurrency exchange said developers should start planning before a machine capable of breaking current cryptography becomes available.
The company stressed that this is a long-term security challenge, not evidence that Bitcoin is compromised. Because blockchain upgrades take time, Coinbase said the industry should prepare before certainty arrives.
WHY QUANTUM COMPUTING MATTERS
Bitcoin relies on cryptographic systems that help users prove ownership of their coins and authorise transactions. A sufficiently powerful quantum computer could eventually undermine some of the digital-signature methods used by Bitcoin and other blockchains.
If that happens, attackers could potentially derive private keys from exposed public-key information and attempt to take control of vulnerable funds.
Today’s quantum computers cannot carry out that attack at the scale required to break Bitcoin’s security. Researchers still face technical barriers, and nobody knows when a cryptographically relevant quantum computer might become practical.
Nevertheless, Coinbase argues that uncertainty is a reason to prepare early, rather than postpone the work.
The exchange’s latest position builds on research released earlier this year by its Independent Advisory Board on Quantum Computing and Blockchain.
That work concluded that the threat is not imminent, but that the transition could be difficult because it would affect networks, wallets, exchanges, custody providers and users.
A COMPLEX, MULTI-YEAR TRANSITION
Coinbase said preparing Bitcoin requires more than selecting a new quantum-resistant signature method. Any solution must protect existing and newly created funds, fit within Bitcoin’s limited block space, and allow ordinary users to transact without excessive complexity.
It must also enable independent full nodes to validate transactions without demanding unreasonable computing resources.
Bitcoin is a decentralised network, so no single company can impose a change on every participant. Developers must assess possible designs, review their security, test implementations and build agreement across the ecosystem.
Users and service providers may then need to move funds into upgraded wallet formats. That process could take years, making early planning important.
FLEXIBLE SECURITY OPTIONS
Coinbase favours designs that allow developers to change or add signature methods without rebuilding the entire system.
It highlighted proposals such as Pay-to-Merkle-Root, known as P2MR and associated with BIP-360, alongside other possible address constructions. The aim is to make future security upgrades easier to introduce as research develops.
The exchange also discussed staged protection for wallets. Under one possible approach, a transaction could offer both a conventional signature path and a post-quantum option.
This could help users adopt stronger protection while developers continue debating the best long-term standard. However, such designs would need careful review and testing before broad use.
The company also highlighted multiparty computation, or MPC, as an important consideration for institutional custody. MPC techniques divide key-related operations among separate parties or systems, helping prevent any one party from controlling a complete private key.
Coinbase said at least one viable post-quantum approach should work well with these custody methods.
THE QUESTION OF LOST BITCOIN
One difficult issue involves coins held in wallets that owners can no longer access or that remain inactive for years. Some older Bitcoin holdings may have greater exposure because their public keys are already visible.
If quantum computers eventually become powerful enough to threaten existing cryptography, these coins could raise difficult questions for the network.
Coinbase said the community should discuss how to handle abandoned or inaccessible funds while technical work continues.
Possible approaches could carry significant consequences for property rights, network rules and user confidence.
The company did not present a final answer, stressing that the issue requires broad debate rather than a rushed decision.
COINBASE PREPARES ITS OWN SYSTEMS
Coinbase said it is preparing its infrastructure for a post-quantum future and contributing to wider work on Bitcoin security. The company has said it is developing post-quantum capabilities for its key-management systems and supporting open-source research. It is also working with developers and researchers to discuss migration options.
The exchange has a significant market role because it safeguards digital assets for individual customers and institutions. Coinbase has said it holds about five per cent of all Bitcoin in existence.
That exposure gives the company a strong reason to assess how future cryptographic changes could affect custody, transaction signing and customer protection.
Still, Coinbase acknowledged that no single company can solve the problem alone. Bitcoin’s security depends on collaboration among researchers, developers, wallet providers, exchanges, miners and users.
A successful transition would require clear communication, careful testing and a practical migration path for people who may not follow technical debates closely.
WHAT HAPPENS NEXT
Coinbase’s paper is intended to contribute to an ongoing discussion, not to establish a final industry-wide plan. Developers must continue evaluating proposed signature schemes, testing their performance and considering how to protect funds during a transition.
They must also ensure that any changes preserve Bitcoin’s core principles of security, decentralisation and independent verification.
For investors, the message is to understand the difference between a future risk and an immediate breach. Coinbase has not said that quantum computers can currently steal Bitcoin at scale. Instead, it argues that the potential consequences are serious enough to justify preparation well in advance.
The wider cryptocurrency industry faces a similar challenge because many blockchain networks depend on cryptographic methods that could eventually need replacement.
Yet each network has its own design, governance process and upgrade requirements, so solutions will not necessarily be identical. Progress will depend on research, testing and cooperation across the industry.
Ultimately, Coinbase wants Bitcoin developers to start the difficult work now, while there is time to assess options without emergency pressure.
Quantum computing remains an uncertain threat, but a secure transition would require long planning, broad agreement and careful execution.
The company’s central warning is straightforward: preparation should begin before the technology becomes a practical danger.
