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throw0101c | on: Cracking a 512-bit DKIM key for less than $8 in the cloud
> (and to some extent NIST, because Ed25519 has not been approved by them).

Ed25519 (and Ed448) have been approved for use in FIPS 186-5 as of February 2023:

* https://en.wikipedia.org/wiki/EdDSA#Standardization_and_impl...

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