FT News Briefing The quantum revolution: Q-Day
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Mar 11, 2023 Delve into the world of Q-Day, the date when quantum computers could crack internet encryption. Cybersecurity expert Mark Carney reveals the implications of this revolutionary technology. Mathematician Peter Shor recounts his groundbreaking discovery that showcases quantum computing's potential. Leaders like Jack Hidary warn of immediate threats from quantum advancements, while cryptographer Dan Bernstein highlights the necessity for new math-based defenses. The discussion balances excitement for the future with concerns over current encryption vulnerabilities.
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Password Cracking
- Mark Carney, a cybersecurity expert, explains how easy it is to crack common passwords.
- People use predictable words, names, or simple number sequences, making brute-force attacks effective.
Quantum Speed
- Quantum computers don't guess passwords sequentially but consider all possibilities simultaneously.
- This drastically reduces cracking time from billions of years to mere minutes.
Qubits and Quantum States
- Quantum computers use qubits, existing in a state of both 0 and 1 simultaneously.
- This allows them to explore countless possibilities at once, unlike classical computers.