Coinbase released a series of technical guidelines regarding Bitcoin’s shift to post-quantum security, advising the network to kick off preparations immediately since this undertaking will span multiple years and involve significant complexity.
The cryptocurrency exchange, which maintains custody of 5% of all existing bitcoin Bitcoin (BTC) supply, noted that it is actively readying its own infrastructure for a post-quantum era. The company emphasized that safeguarding the Bitcoin blockchain from quantum vulnerabilities goes far beyond simply choosing a quantum-safe signature algorithm.
Coinbase explained that an optimal strategy would secure both vulnerable and newly generated assets, fit comfortably inside Bitcoin’s restricted block capacity, maintain decentralized validation by full validation nodes, integrate seamlessly with institutional custody platforms, accommodate everyday user wallets, and offer a realistic roadmap for coins that may never be relocated.
“We feel it is vital to start getting ready long before any official CRQC (Cryptographically Relevant Quantum Computer) breakthrough is declared,” Coinbase remarked. “Modifying Bitcoin consensus rules and upgrading the broader ecosystem can require years, meaning we must kick off these efforts today.”
High-level recommendations
The trading platform outlined a number of primary preferences. It stated that post-quantum output configurations ought to decouple the “container” from the underlying signature mechanism, enabling technologies to be integrated, swapped out, or expanded without requiring a total architectural overhaul. Coinbase highlighted P2MR (BIP-360) and P2TRv2 as architectures that seem to deliver this level of adaptability.
Furthermore, Coinbase expressed support for incremental security measures where active wallets could adopt a post-quantum-ready or hybrid setup prior to any definitive ruling on legacy signatures. One potential method highlighted was a 1-of-2 structure that grants identical funds dual spending routes, where one pathway is secured via standard ECDSA or Schnorr keys and the other relies on a post-quantum key.
Concerning signature algorithms, the enterprise emphasized the necessity of pairing any implementation of stateful signatures with a stateless alternative, given that stateful systems introduce vulnerabilities related to state tracking errors that might facilitate forgery.
Coinbase additionally underscored that multiparty computation (MPC) compatibility is a vital factor for institutional storage solutions, maintaining that at least one functional post-quantum alternative should demonstrate strong MPC integration potential.
“When executed properly, MPC delivers robust defense against key compromise, serving as a critical layer of protection for major entities subjected to relentless assaults on their systems,” according to Coinbase.
Addressing lost or dormant tokens, Coinbase acknowledged that these topics are intricate and warrant extensive debate, though conversations can proceed concurrently with the engineering work required to introduce post-quantum signature capabilities.
“Coinbase is confident that Bitcoin will remain the most reliable digital asset in a post-quantum landscape,” the firm stated. “We aim to support the community’s initiatives and foster an environment that enables deliberate, ongoing advancement.”
Originally published at https://www.theblock.co/news/ecosystems/2026-10-13-coinbase-bitcoin-post-quantum-migration-418509.
