alt Hacker NewsCertificates provide extra features, like revocation.
However, if you do not need the extra features provided by certificates, using SSH-generated keys is strictly equivalent with using certificates and it requires less work.
TOFU is neither necessary nor recommended, it is just a convenience feature, to be used when security may be lax.
The secure way to use SSH is to never use TOFU but to pair the user and the server by copying the public keys between the 2 computers through a secure channel, e.g. either by using a USB memory or by sending the public keys through already existing authenticated encrypted links that pass through other computers. (Such a link may be a HTTPS download link.)
When using certificates, a completely identical procedure must be used. After certificates are generated, like also after SSH keys are generated, the certificates must be copied to the client computer and the server computer through secure channels.
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> TOFU is neither necessary nor recommended
Just to make it clear: this does not mean that it is fine to blindly accept the message on first use.
The "secure way" implies copying the server's public key as well, which people generally don't do, right? Which is equivalent to verifying the fingerprint shown with the TOFU message, correct?
> When using certificates, a completely identical procedure must be used. After certificates are generated, like also after SSH keys are generated, the certificates must be copied to the client computer and the server computer through secure channels.
That is not the case, and is a major advantage of certificates.