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Post-quantum cryptography

Cryptographic systems designed to be secure against quantum attacks.

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    Quantum supremacy was demonstrated by Google's quantum computer solving a sampling problem with 53 qubits, requiring classical verification of about nine quadrillion calculations.
    Quantum computing's potential to break current cryptographic systems hinges on scalable quantum computers, which require millions of qubits.
    Quantum error correction is essential for reliable quantum computing, as decoherence remains a significant hurdle.
    Quantum computing can solve NP-complete problems faster than classical computers, but the speedup is modest, not exponential.
    The current NISQ era allows quantum computers to perform tasks difficult for classical computers, despite being non-error corrected.

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