Crypto And Quantum Computing – Is it a Threat?

Quantum computing is rapidly evolving from theory to practical reality, raising pivotal questions for the future of blockchain technology and cryptocurrencies. As the cryptography underlying most digital assets faces unprecedented computational challenges, industry stakeholders and end users must keep pace with the latest developments to secure digital property.

Why Quantum Computing Matters for Blockchain

Quantum computers utilize quantum bits (qubits) to perform certain calculations exponentially faster than classical computers. This leap in computing power means that many cryptographic algorithms currently used to secure blockchain networks, such as RSA and elliptic curve cryptography (ECC), are fundamentally vulnerable to quantum attacks.

Specifically, quantum algorithms like Shor's algorithm can efficiently solve problems—like factoring large numbers—that form the bedrock of public-key cryptography. When a sufficiently powerful quantum computer becomes available, it could potentially derive private keys from public keys, undermining wallet security, transaction validation, and the integrity of entire blockchains Read more on Halborn.

Potential Impact on Cryptocurrencies

The threat from quantum computing is not theoretical but calculable. For example, Bitcoin relies on ECC to secure wallet addresses and validate ownership. If a quantum machine could crack the discrete logarithm problem that ECC depends on, it would enable attackers to access funds and manipulate transactions. A recent Capgemini report warned that up to 25% of Bitcoin could be at risk if quantum hardware continues advancing.

This quantum threat extends beyond Bitcoin to virtually all cryptocurrencies based on classical cryptographic methods. Transaction signatures, smart contracts, and consensus mechanisms could all be vulnerable. Notably, the risk is not limited to cryptocurrencies: internet protocols like HTTPS, which protect online banking and e-commerce, are similarly exposed Learn more from BitPay.

Timeline of the Quantum Threat

While some headlines suggest an imminent quantum apocalypse, most experts agree that the threat remains several years away. The arrival of cryptographically relevant quantum computers (CRQC) has been repeatedly forecasted as “10 years in the future,” yet rapid advancements by Google, Microsoft, and others in 2024–2025 have brought renewed urgency to the discussion.

Recent scientific estimations suggest that breaking an RSA key could take a quantum computer around 8 hours, while a Bitcoin signature might be hacked in just 30 minutes under specific conditions Deloitte analysis. The practical risk increases if blockchain addresses are reused or if attackers are able to harvest encrypted data now and decrypt it later (“harvest now, decrypt later” attacks).

How the Crypto Industry Is Responding

The looming quantum threat is galvanizing action across sectors. Financial institutions, governments, and crypto development teams are investing in post-quantum cryptography (PQC)—a new class of algorithms designed to resist quantum attacks. According to Capgemini, 70% of large organizations are preparing for PQC, though only 2% of cybersecurity budgets are currently allocated toward this transition Capgemini Report.

For blockchains, migration to quantum-resistant protocols is already underway. Upgrading wallets and consensus mechanisms with PQC is essential to ensure future-proof security.

What Should Users Do Now?

For everyday users, the current priority is awareness and adopting best practices:

• Do not reuse wallet addresses: This is critical, as reusing addresses increases exposure to quantum attacks.

• Stay informed on security updates: Monitor wallet providers and blockchain communities for developments on quantum resistance and cryptography upgrades.

• Choose hardware wallets with robust security: While quantum-resistant wallets are not widely available today, selecting a hardware wallet with strong security design and upgradable firmware—such as OneKey—can help mitigate risks as new threats emerge.

Why OneKey Is Well Positioned

OneKey hardware wallets are designed with adaptability and security as core principles. The firmware update mechanism enables rapid adaptation to evolving threats, including quantum computing. As the sector shifts toward quantum-resistant cryptography, users of agile, security-focused hardware wallets like OneKey will be better equipped to benefit from new protections and standards.

Staying ahead in crypto security means anticipating tomorrow’s challenges while safeguarding assets today. Whether you’re a casual holder or a seasoned developer, understanding the quantum threat and equipping yourself with upgradable, transparent solutions like OneKey is essential for future-proof digital asset management.

Explore more about quantum computing and its impact on cryptography in the Halborn Blockchain Security Overview.