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Why do quantum computers threaten cybersecurity?

Quantum computers are very different to traditional computers. For example, they use quantum bits, or qubits, which can represent a “0” and a “1” simultaneously. Their processing power increases exponentially with the number of these qubits, which is one reason why they are able to solve the mathematically complex problems on which some of our security system are based, in a fraction of the time that is required today. The math behind asymmetric encryption is one example.