Bitcoin needs to get ready for quantum security now
The long-term security of bitcoin is once again a hot topic as Coinbase urges the wider cryptocurrency ecosystem to begin planning for the potential threat posed by quantum computing.
The exchange argues that developers, wallet providers, institutional custodians and other players should begin preparing for a post-quantum migration before quantum computers are capable of threatening current cryptographic systems.
Coinbase said in a blog post that upgrading Bitcoin’s security will require significant technical development, network coordination and changes to wallet infrastructure. These processes can take a few years, and if one waits until a practical quantum threat appears, the transition may be more difficult.
The proposal focuses on the design of adaptable transaction structures, the exploration of quantum-resistant signature schemes and the assistance to Bitcoin holders to transition to stronger security without disrupting the network.
Coinbase Lays Out 7 Priorities to Get Bitcoin Ready for the Quantum Future
Coinbase posted a blog on seven technical priorities for making Bitcoin post-quantum ready for the future where quantum computing could undermine the existing cryptographic protection. The main recommendation is to start researching and planning for migration early, rather than waiting for a proven threat.
Build Flexible Bitcoin Transaction Structures
Coinbase allows for transaction designs that separate the structure of a Bitcoin output from its signature scheme. This approach may facilitate the introduction of new cryptographic techniques without re-designing the entire protocol. BIP-360 (Pay-to-Merkle-Root (P2MR)) and P2TRv2 are identified as good starting points for further research.
Implement Hybrid Security for Active Wallets
Bitcoin transactions could be authorized with either a traditional cryptographic key or a post-quantum key using a hybrid approach. For example, a 1-of-2 construction could provide a gradual migration path as developers evaluate long-term security needs and compatibility.
Fulfilll Custody Requirements of the Institution
Existing custody infrastructure needs to be augmented with post-quantum security solutions for institutional custodians. Coinbase also emphasizes support for multi-party computation, a technique that splits up signing operations across multiple signers. Institutions may face further technical challenges in upgrading their Bitcoin security systems without adequate support.
Evaluation of Post-Quantum Digital Signature Schemes
Besides the lightweight SHRINCS scheme, Coinbase also lists ML-DSA, SLH-DSA, and FN-DSA as candidate signature schemes. Each option should be carefully evaluated for security, signature size, verification speed, and suitability for Bitcoin transactions.## 5. Consider Bitcoin’s Block-Space Limits
Quantum resistant signatures may have more data than conventional signatures. Coinbase suggests taking candidates into consideration especially for Bitcoin, because bigger signatures may impact the capacity, fees and efficiency of the network.## 6. Enable Migration Planning Across Multiple Years
Any large crytographic switch would need to be coordinated by Bitcoin developers, exchanges, wallet providers and institutional custodians. Coinbase also notes that protocol upgrades and wallet changes require extensive testing and community consensus.
Create a Bitcoin Specific Evaluation Process
Coinbase advises testing post-quantum algorithms against Bitcoin’s unique requirements, rather than relying solely on generic security rankings. The process should be designed to provide long-term protection, make transaction verification easy, and be compatible with the network.
Rising Industry Awareness of Quantum Computing Risks
Coinbase’s proposed action is part of broader industry efforts to enhance cryptocurrency security. The report said that in July 2026, Coinbase co-founded the Bitcoin Security Consortium with BlackRock, Strategy, and ARK Invest, committing $15 million over three years to support open-source quantum security research.
Regulatory and cybersecurity bodies have also been stressing the need for readiness for post-quantum cryptography. In the meantime, developments across the crypto industry indicate that exchanges, wallet providers and blockchain developers are taking a closer look at how existing security systems can be upgraded.
BitGo has started quantum-resistance evaluation and wallet protection work, and Zcash developers have looked into timelines for quantum-resistant payment features. These initiatives are part of a wider movement to prepare digital resources for future cryptographic challenges.
What you need to know if you own Bitcoin
Bitcoin uses cryptography to secure ownership and to validate transactions . A quantum computer that is powerful enough may be able to break some of the cryptographic systems that support digital currencies today. But that doesn’t mean this type of computer exists today or that Bitcoin is imminent for quantum attack.
For holders, the main question is whether wallets, custody providers and the Bitcoin protocol can switch to appropriate quantum-resistant techniques before existing protections are broken. Institutional investors may face even greater challenges, as their custody arrangements involve complex signing systems, compliance requirements and large asset holdings.
Summary
Coinbase’s warning emphasizes the importance of planning early, rather than scrambling at the last minute, for Bitcoin’s post-quantum security. Its recommendations focus on flexible transaction designs, hybrid wallet security, compatible institutional custody and Bitcoin-specific signature testing.
While no practical quantum threat to Bitcoin has been demonstrated, it could take years for upgrades to be developed and coordinated. Launching the preparations now would give developers, exchanges and investors more time to evaluate options and plan a safe transition. The emphasis is on research and preparation, not on the fact that Bitcoin’s current security has already been breached.
