Europol is calling on the cryptocurrency industry to begin preparing for a future quantum-computing threat, warning that moving wallets, blockchain protocols and users to stronger cryptography could take years. The European Union’s law-enforcement agency says the technology capable of breaking today’s relevant protections does not yet exist, but the scale and coordination required for a transition make early planning important.
According to CryptoSlate, Europol’s European Cybercrime Centre outlined the warning in a report published on October 7. The report focuses primarily on the cryptographic keys that control crypto assets and recommends a phased move toward quantum-resistant systems.
Why wallets are the main concern
A cryptocurrency wallet uses a private key to authorize transactions. A corresponding public key allows the network to verify that authorization. Europol says a sufficiently powerful and fault-tolerant quantum computer could eventually use an exposed public key to calculate the associated private key. An attacker could then create valid-looking signatures and spend funds without the owner’s permission.
The agency distinguishes this risk from the threat to blockchain hash functions. Hashes support important parts of blockchain integrity and are considered comparatively resilient against quantum attacks, although Europol does not describe them as completely immune. The distinction means that quantum preparation is not simply about replacing every component of a blockchain at once; protecting the mechanisms that establish ownership is a central priority.
Europol stresses that this is a future risk rather than evidence of an active quantum attack. The EC3 says quantum computers with the power and reliability needed to break the relevant cryptography are not currently available, and the timing of such a development remains uncertain.
What developers, providers and users can do
The report divides the transition into responsibilities for the broader crypto ecosystem.
- Blockchain developers should work on integrating post-quantum cryptographic algorithms into core protocols and cooperate with wallet providers.
- Wallet providers should test and deploy compatible products, while clearly explaining the risks, benefits and timetable to customers.
- Users should move assets to quantum-resistant wallets as suitable options become available.
Europol also recommends stronger address and key-management practices during the transition. However, it warns that moving funds to a new address alone does not make the signature technology quantum-resistant. The underlying cryptographic system must also be upgraded.
The transition may require more than a conventional software update. Existing wallet hardware could become incompatible with new arrangements, while assets held in unspent transaction outputs, commonly known as UTXOs, would need to be moved through transactions recorded on the blockchain. Post-quantum signatures may also be larger, creating additional compatibility and capacity challenges.
For those reasons, Europol favors a staged process that can prioritize holdings considered more exposed. The agency also calls for clear roadmaps and accessible explanations, arguing that effective communication can help users prepare without creating unnecessary panic around an uncertain technological timeline.
Why the upgrade could take years
Replacing cryptography across millions of wallets and blockchain nodes would be a resource-intensive undertaking. It would require technical development, testing and deployment, but also agreement among participants in decentralized networks. Community consensus and governance could therefore become part of the security challenge.
Europol’s message is that preparation should begin before a quantum computer becomes capable of exploiting current systems. Developers, wallet companies and users would need to coordinate their actions, test quantum-resistant wallets and determine how assets can be migrated without disrupting networks. The agency presents incremental upgrades and post-quantum cryptography as a route for cryptocurrencies to adapt, rather than suggesting that existing blockchains are already obsolete.
Moneyiar market picture
Moneyiar data at 21:54 on October 8, 2026, showed Polygon (prev. MATIC), now listed as POL, at $0.0982992496, down 3.19% over 24 hours and 8.37% over seven days. Quant (QNT) stood at $237.1865262307, down 5.56% in 24 hours and 3.76% over seven days. AKEDO (AKE) traded at $0.0261353801, down 4.47% over 24 hours and 15.05% over seven days. The data does not establish a connection between those market movements and Europol’s quantum-security report.
