Bitcoin’s security under quantum threat
Around 7 million BTC could be vulnerable to quantum-based attacks, a cybersecurity expert warns.
A leading cybersecurity expert has raised concerns that Bitcoin’s underlying cryptography could be broken within five years. David Carvalho, CEO of Naoris Protocol, warned that quantum computers could soon break the cryptography securing Bitcoin transactions.
He believes the threat could materialise sooner than most anticipate, urging immediate action.
Carvalho pointed to Shor’s algorithm as the core concern. Once sufficiently advanced quantum machines are deployed, they could crack Bitcoin’s defences in seconds.
Roughly 30% of all Bitcoin—around 6 to 7 million BTC—is currently held in wallets with exposed public keys, making them especially vulnerable.
He also referenced major breakthroughs in the field, including Microsoft’s Majorana chip and IBM’s planned release of a fault-tolerant quantum computer by 2029.
With over 100 quantum systems already active and thousands more expected by 2030, Carvalho advised investors to migrate funds to quantum-secure wallets and update their security protocols.
However, Adam Back, CEO of Blockstream and an early Bitcoin contributor, believes the technology is still decades away from posing a real threat. He did acknowledge that future advancements may force even early adopters to move their coins to quantum-resistant addresses.
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