Ledger CTO Says Bitcoin Should Prepare for Future Quantum Risks

As quantum computing advances, experts are beginning to question how it might affect the security of cryptocurrencies including Bitcoin. Charles Guillemet, Chief Technology Officer at Ledger, believes Bitcoin’s cryptography is strong enough for now. 

However, he warned that future quantum computers could eventually pose a threat. He urges the Bitcoin community to start planning for that possibility before it becomes a real problem.

Ledger CIO Says Bitcoin’s Current Security Holds Strong

Quantum computers, once powerful enough, could theoretically break the cryptographic systems that secure Bitcoin wallets and transactions. 

Guillemet explained that Bitcoin currently relies on the Elliptic Curve Digital Signature Algorithm, which is nearly impossible to crack using traditional computers. This also includes the quantum computers currently in development. 

However, he added that quantum technology might eventually solve the complex mathematical problems behind it in the future. This could expose private keys and allow unauthorized transfers. Although such an event may be rare or unpredictable, he says it should not be ignored.

To stay ahead, Guillemet urged the Bitcoin developers and community to begin working on an upgrade that would make the network resistant to quantum attacks. 

He noted that such a transition, however, would not be straightforward.

Crypto Leaders Warn Bitcoin to Prepare for Quantum Threats

Charles Guillemet is not the only one raising concerns about the potential threat quantum computers pose to Bitcoin’s security. Several leading figures in the crypto industry have recently voiced similar warnings. 

Speaking at the All-In Summit 2025, Solana co-founder Anatoly Yakovenko warned the Bitcoin community to act fast against looming quantum threats. He said breakthroughs in quantum computing could arrive sooner than expected, potentially outpacing Bitcoin’s ability to adapt. 

Similarly, Paolo Ardoino, CEO of Tether, has also weighed in on the debate. In a February 8 post on X, he predicted that future quantum computers might eventually be powerful enough to hack inactive Bitcoin wallets. This includes those possibly owned by Satoshi Nakamoto. 

The Trade-Offs of a Quantum Upgrade for Bitcoin

While proactive steps are necessary, Guillemet warned that switching to quantum-resistant encryption comes with challenges. He pointed to lattice-based cryptography as the most promising post-quantum option. However, he admits that it is still new and unproven.

Furthermore, he mentioned that hash-based cryptographic schemes, though more established, are often seen as outdated and may not integrate well with modern systems. 

He also warned that quantum-resistant methods may not work well with Bitcoin’s existing BIP32 wallet structure, making implementation more complex.

Nevertheless, Guillemet called for a balance. He said the Bitcoin blockchain should prepare for the quantum era, but not rush into untested solutions. He believes the goal should be long-term security without sacrificing the network’s current stability and trust.