Quantum Threat to Bitcoin's Security Still Decades Away, Says Blockstream CEO

Adam Back argues current quantum hardware lacks the power to crack Bitcoin's encryption anytime soon.

Apr. 10, 2026 at 8:27am

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A detailed, glowing 3D illustration of a Bitcoin mining rig or node, with intricate metallic components and circuit boards illuminated by vibrant neon lights, conveying the complex digital infrastructure underlying the cryptocurrency's security.As the threat of quantum computing looms, the Bitcoin industry is proactively preparing for a future where cryptographic security must adapt to new technological realities.Denver Today

Blockstream CEO Adam Back believes the threat of quantum computing to Bitcoin's cryptographic security is still decades away, despite concerns from some that advanced quantum computers could soon crack the cryptocurrency's encryption. Back cites the limited capabilities of existing quantum hardware and the need for significant algorithmic and hardware breakthroughs before quantum computers pose a real risk to Bitcoin.

Why it matters

The debate over quantum computing's threat to Bitcoin's long-term viability is an important one, as the cryptocurrency's security underpins its entire ecosystem. Back's perspective, supported by recent academic research, suggests the industry has time to gradually transition to quantum-resistant cryptography without major disruption.

The details

Back argues that current quantum computers are experimental and lack the error correction and computational power needed to break real-world encryption like Bitcoin's elliptic curve cryptography. He advocates for a gradual migration path toward quantum-resistant signature schemes, giving users and custodians time to update keys and infrastructure. Blockstream's research team has been working on post-quantum approaches, and the recent NIST approval of post-quantum cryptography standards is seen as a key milestone that could accelerate industry adoption.

  • In late 2024, the National Institute of Standards and Technology approved post-quantum cryptography standards.

The players

Adam Back

The CEO of Blockstream, a leading Bitcoin and blockchain technology company.

Blockstream

A company that develops Bitcoin and blockchain technology, including research into post-quantum cryptography.

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What they’re saying

“Quantum computing's threat to Bitcoin is a topic that sparks both intrigue and concern. While some fear the potential for quantum computers to crack Bitcoin's cryptographic security, others argue that the technology is still in its infancy and far from posing an immediate risk.”

— Adam Back, CEO, Blockstream

The takeaway

The debate over quantum computing's threat to Bitcoin highlights the cryptocurrency's resilience and adaptability. While the risk may be decades away, the industry's proactive approach to preparing for quantum-resistant cryptography demonstrates Bitcoin's ability to evolve and maintain its long-term security and stability.