Europol has released two reports urging the crypto industry and policymakers to prepare for potential threats from quantum computing. The reports say wallet private keys remain the main point of exposure, while the hash functions that help keep blockchains running are, for now, broadly considered resistant to quantum attacks. One estimate cited in the reports says upgrading all Bitcoin transaction outputs to quantum-resistant schemes would require at least 76 days of cumulative downtime. Europol also said there is currently no clear evidence that so-called "harvest now, decrypt later" attacks have been used on a large-scale, systematic basis. The warning adds to a growing policy discussion around how digital asset systems should prepare for future cryptographic risks before those threats become practical.
Europol has published two reports urging the crypto industry and policymakers to prepare in advance for threats tied to quantum computing.
The reports say wallet keys are the main point of exposure, while the hash functions that support blockchain operations are, at present, broadly resistant to quantum attacks.
One estimate cited in the research says upgrading all Bitcoin transaction outputs to quantum-resistant schemes would require at least 76 days of cumulative downtime.
Europol also said there is currently no clear evidence that "harvest now, decrypt later" attacks have been used on a large-scale, systematic basis.
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