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How to stop quantum computers from breaking the internet’s encryption
(www.sciencenews.org)
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The problem is in theory not as big as it sounds. Quantum computing takes away one exponent. Meaning it reduces a complexity of 2^x to x.
But it also reduces 2^x^y only to x^y.
And we have cryptography that features that complexity, too.
In practice, quantum computers still are a very tough challenge, because our 2^x algorithms are virtually everywhere, and going through that is a similar effort as was the y2k problem, only with much much much more code, because y2k was 23 years ago