Introduction
The arrival of quantum computing promises to revolutionize science and technology, but it also poses significant risks to digital security. One of the most discussed is the impact it could have on cryptocurrencies, especially Bitcoin, whose global value exceeds hundreds of billions of dollars.
Development
What is the quantum threat?
The quantum threat refers to the moment when quantum computers are capable of breaking current cryptographic systems, such as RSA and ECC, which protect transactions and data. This scenario, known as Q-Day, could occur as soon as in 2028, according to expert estimates.
Magnitude of risk
Bitcoin: up to 900 billion dollars at risk.
Global cryptoassets: estimates of up to 4 trillion dollars at stake.
Other systems: secure communications, digital banking, national defense, and private data.
Why is current cryptography vulnerable?
Shor's Algorithm: allows factoring large numbers and breaking RSA/ECC.
Grover's Algorithm: speeds up the search in hash functions, reducing effective security.
Although Bitcoin uses SHA-256, exposed public keys remain a weak point.
Potential consequences
Massive loss of funds in vulnerable wallets.
Collapse of trust in the crypto market.
Regulatory intervention to protect financial systems.
Defense strategies
Post-quantum cryptography (PQC): new algorithms resistant to quantum attacks, driven by NIST.
Migration of old wallets: move funds to addresses that do not expose public keys.
Regulatory and business awareness: early preparation to update protocols before 2028.
Conclusion
The quantum threat is not science fiction: it represents a real challenge to global digital security. The technology and financial community must accelerate the transition to post-quantum algorithms to prevent 'Q-Day' from becoming a crisis of trust and economic stability.