As quantum computing edges closer to mainstream capability, one cybersecurity expert is sounding the alarm on Bitcoin’s long-term security.
David Carvalho, the CEO of Naoris Protocol, believes that Bitcoin’s reliance on elliptic-curve cryptography may soon become its Achilles’ heel.
Carvalho warns that a class of powerful quantum algorithms, particularly Shor’s algorithm, could potentially break Bitcoin’s cryptographic defenses in just seconds once the hardware catches up. According to him, this technological leap could arrive in as little as three to five years.
What’s at stake? Nearly a third of Bitcoin’s circulating supply—coins stored in wallets that have exposed public keys—could be vulnerable to theft in a post-quantum world.
Carvalho calls this looming shift “Q-Day,” a tipping point when modern encryption fails to withstand quantum attacks. With major players like Google and Microsoft racing toward quantum supremacy and IBM planning a fault-tolerant system by 2029, he says the timeline may be shorter than many expect.
He urges investors to take proactive steps: migrate assets to quantum-secure wallets, update systems, and work with custodians preparing for a quantum future.
Still, not everyone shares the urgency. Blockstream CEO and Bitcoin pioneer Adam Back suggests the threat may be 20 years away, though he concedes that legacy wallets—perhaps even those tied to Satoshi Nakamoto—might need to transition eventually.
Alexander Zdravkov
Reporter at Coindoo
Alexander Zdravkov is a person who always looks for the logic behind things. He is fluent in German and has more than 3 years of experience in the crypto space, where he skillfully identifies new trends in the world of digital currencies. Whether providing in-depth analysis or daily reports on all topics, his deep understanding and enthusiasm for what he does make him a valuable member of the team.
Source: https://coindoo.com/bitcoins-greatest-threat-could-be-just-years-away-warns-cybersecurity-expert/