Plain text is a simple file format that contains only basic characters like letters, numbers, and symbols without any special formatting. It can be opened and read on any computer or device without needing special software.

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Random number generators (RNGs) create unpredictable numbers that are essential for cryptography to generate secure encryption keys, initialization vectors, and nonces that attackers cannot guess or predict. Without truly random inputs, encryption systems become vulnerable to being broken by hackers.

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A quantum attack on classical encryption is when a powerful quantum computer uses special algorithms to break the encryption codes that protect digital information today. These attacks could expose passwords, financial data, and secrets that are currently considered secure.

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The first quantum computer was demonstrated in 1998 by a team at UC Berkeley, who created a 2-qubit quantum computer using nuclear magnetic resonance. However, earlier theoretical work and smaller-scale demonstrations occurred in the 1980s and 1990s.

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Quantum computing in cryptography has two main purposes: it can break many current encryption methods that protect sensitive data, and it can create new, stronger encryption codes that are harder to crack. Scientists are developing quantum-resistant cryptography to protect information from future quantum computers.

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