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4

Ed25519 is well-defined and requires you to use SHA-512 as internal hash function along with the twisted Edwards version of Curve25519, hence there's no need for a KAC when it comes to questions about the parameters. As for the integrity of the public key, there's not yet a standard for Ed25519 based certificates so there would be a custom solution needed ...


2

How does value of $p$ comes to $2^{512}$ for security complexity of $2^{72}$? Personally, I couldn't connfirm this number, but rather landed at $2^{66}$. If you don't know how to find this number, just plug the $2^{512}$ into the complexity equation given and take the logarithm to the base two for better readability. Note that Schnorr's complexity ...



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