What is the relationship between modern cryptography and traditional cryptography?

Modern cryptography is developed on the basis of traditional cryptography.

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Traditional cryptography mainly relies on manual calculation and very simple machinery.

But also designed and used by people's subjective consciousness.

The security is not high, but the algorithm is simple and beautiful.

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Modern cryptography mainly depends on the fast computing power of computers.

Based on mathematics, physics and other disciplines.

Form an objective password form

Security is higher than traditional passwords, but the algorithm is complex.

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Personal views are for reference only.