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Topic: Why does 256-bit ECC offers equivalent security of 128-bit symmetric encryption? (Read 485 times)

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I've been studying ECDSA from Royal Fork for a few weeks now, and I think I'm starting to get it. Some question remains.

Why is it that 256-bits of ECC only offers equivalent security of say, 128-bit AES?

Is it because of the birthday paradox? Or is it something else?
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