Re:When did POP and IMAP become a “legacy protocol?”
by Avamander on Wednesday September 28, 2022 @06:01AM
(#33006259)
I just highlighted the fact that OpenSSH (which was an inspiration to the Gemini people) finds this an issue and have devised solutions. You and everyone else are absolutely free to not to trust DNSSEC and deal with the pitfalls of TOFU-over-internet in some other way.
Though in theory, just using SSHFP+DNSSEC and those operators being malicious shouldn't degrade SSH's security, it should only hinder the same TOFU. In which case I suspect people would fall back to the Web PKI to look up the reason for the mismatch.
If you're worried about key continuity issues, do what large SSH fleet deployers do, and use certificates. Key continuity was the motivating use case for SSH certificates, before they were used to do MFA/SSO logins for users.
I don't disagree with the analysis of Gemini's trust model; I think you're right that key continuity doesn't work on the scale of the public web. Of course, I don't think DNSSEC has any answers here, either; the Web PKI is probably the best thing we've got right now.