Quantum Computers Pose Early Threat to Cryptocurrency Security

A new study published by Google has shed light on the potential risks posed by quantum computers to cryptocurrency security.

The research, which analyzed the encryption method used by many digital coins, found that a machine with 500,000 qubits could potentially break the encryption in just a few minutes. This is earlier than previously estimated, as researchers had thought it would require a machine with millions of qubits to breach such encryption.

The study focused on an encryption method called ECC (elliptic curve cryptography), which is widely used by many cryptocurrencies, including bitcoin. ECC works by hiding the user's password behind one of the points that make up a curved line, but a large-scale quantum computer could potentially bypass this encryption by quickly working through the calculations needed to reconstruct the password.

Google has not released the details of the algorithm it developed as part of the study, but it has provided a zero-knowledge proof that enables external researchers to verify the algorithm without finding out how it works. The search giant is also offering recommendations for improving security and stability in preparation for this potential threat.