Quantum Computing and Encryption: A Wake-Up Call
A team of Chinese researchers at Shanghai University, led by Professor Wang Chao, has achieved a significant milestone in quantum computing by successfully cracking a 90-bit RSA encryption using a D-Wave Advantage quantum computer. This accomplishment, published in the Chinese Journal of Computers, raises concerns about the vulnerability of current encryption methods to quantum attacks and underscores the urgent need for developing post-quantum cryptography.
Details of the Breakthrough
The researchers factored a 90-bit RSA integer by combining quantum annealing with classical techniques. RSA cryptography, which secures online transactions by making it difficult to break down large numbers into prime factors, is now potentially at risk. While current RSA keys are much longer (2,048 bits), this breakthrough demonstrates the vulnerability of existing encryption methods to hybrid quantum-classical attacks.
Implications and the Future of Cybersecurity
This development signifies a step closer to the 'Q-day,' when quantum computers can instantly decrypt current security systems. While the method doesn't directly attack Bitcoin's ECDSA encryption, it sets a precedent for quantum attacks on cryptocurrencies and other encrypted data. Experts recommend proactively adopting post-quantum cryptography to safeguard digital assets and ensure long-term data protection against evolving quantum threats.