European financial regulators are advancing an uncomfortable hypothesis for Bitcoin: the threat to current cryptographic systems could materialize even before quantum computers find viable commercial applications.
According to estimates relayed by CryptoQuant and Project Eleven, around 6.9 million BTC already rely on outputs whose public key is visible. In the timeframe used in the study, this group represented nearly $586 billion

The EBA, ESMA and EIOPA classify quantum computing as an emerging risk to the financial system

About 6.9 million BTC—around 34% of the circulating supply—would be associated with public keys that are already exposed

BIP-360 prepares a new format that limits this exposure, while BIP-361 organizes a gradual migration

No quantum computer capable of breaking the signatures used by Bitcoin exists currently

Nearly 6.9 million bitcoins already expose their public key

In their joint report on risks and vulnerabilities, the three European supervisory authorities—EBA, ESMA and EIOPA—warn that a sufficiently powerful quantum computer could compromise the cryptographic systems used to secure communications, transactions, databases and blockchains.
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