Coinbase Raises Alarm Over Quantum Risk to Crypto Wallets

• Coinbase says quantum computing may one day break crypto cryptography and wallet security.
• Post-quantum standards exist, but require industry-wide migration and coordination.
• XRP Ledger prepares for a full transition to post-quantum cryptography by 2028.

Coinbase has raised fresh concerns about the long-term security of crypto assets. It warns that future advances in quantum computing could eventually break the cryptographic systems that protect wallets, transactions, and blockchains.

The warning comes as the exchange’s Quantum Advisory Council released its first detailed position paper. It outlines both the risks and the roadmap for the crypto industry.

Crypto Safe Today, But Not Forever

According to the report, today’s blockchain networks remain secure. However, a sufficiently powerful quantum computer could one day crack the digital signatures that prove ownership of crypto assets.

The council expressed strong confidence that such machines, known as fault-tolerant quantum computers, will eventually be built. 

While most expert estimates suggest this could take at least a decade, the timeline remains uncertain and could arrive sooner. This creates a clear message: preparation cannot wait until the threat becomes immediate.

Wallets Identified as the Weakest Link

The report highlights that not all parts of the crypto ecosystem face equal risk. Core blockchain infrastructure, including Bitcoin’s mining and transaction history, is largely resistant to quantum attacks. 

However, wallet-level security is more vulnerable, particularly where public key information is exposed on-chain. For Bitcoin, the paper estimates that millions of coins could fall into this higher-risk category.

Meanwhile, proof-of-stake networks like Ethereum face additional exposure through validator signatures, though developers are already working on mitigation strategies.

Solutions Exist, But Migration Is Complex

The good news is that quantum-resistant cryptography is not theoretical. Standards have already been developed, including those from the National Institute of Standards and Technology.

But the challenge lies in implementation.

New cryptographic systems require larger signatures, which can impact speed, cost, and storage. More importantly, upgrading millions of wallets across decentralized ecosystems presents a coordination problem that has no precedent in traditional finance.

Major Blockchains Begin Transition Plans

Different blockchain networks are moving at varying speeds to address the issue.

Bitcoin developers are exploring improved address formats, though no full migration plan has been finalized. Ethereum has outlined a clearer roadmap, combining quantum resistance with broader scalability improvements.

Other networks, including Solana, Algorand, and Aptos, have begun introducing or planning quantum-resistant features. At the same time, Layer-2 solutions like Optimism are already setting timelines for transition.

XRP Ledger Set Quantum Readiness by 2028 

RippleX is preparing the XRP Ledger for quantum computing threats, with a full transition to post-quantum cryptography targeted for 2028. Ayo Akinyele, Head of Engineering at RippleX, said the effort is a major architectural shift rather than a simple upgrade.

XRPL already has an advantage with features like key rotation and seed-based key generation, which could simplify migration compared to other blockchains. The roadmap includes four phases: 

• Emergency recovery planning
• Research and testing (2026)
• Controlled integration on Devnet (late 2026)
• And a full network-wide rollout of post-quantum signatures by 2028.

RippleX is working with cryptography experts and partners like Project Eleven, with developers already testing early implementations. 

The Challenge of Dormant Wallets

Meanwhile, one of the most difficult questions raised in the Coinbase report concerns inactive or lost wallets. If some users fail to upgrade to quantum-resistant systems, their assets could remain exposed. 

Blockchain communities may eventually need to decide whether to freeze, revoke, or leave such funds vulnerable. Any of these decisions could have major implications for market trust and asset ownership.

Coinbase Pushes Industry Coordination

Coinbase says it is building systems that can quickly adopt new cryptographic standards and is working with developers and infrastructure partners to ensure readiness.

The exchange also emphasized that no single company can solve the challenge alone. Industry-wide coordination will be essential to ensure a smooth transition before quantum computing becomes a real threat.

While quantum computing is not an immediate danger, the report aligns with recommendations that the crypto industry should aim to complete post-quantum upgrades by around 2035.

In short, the threat may still be on the horizon, but the groundwork to defend against it must begin now.

Related: Quantum Proposal Won’t Save Satoshi’s Bitcoin, Says Cardano Founder