...and then if the fingerprint changes, you get something like this:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@@@ WARNING! THIS ADDRESS MAY BE DOING SOMETHING NASTY!! @@@

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

... and then you do rm .ssh/known_hosts and try again :P

ssh-keygen -f ~/.ssh/known_hosts -R 123.45.67.89

If you get past the terrifying warning, it even gives you the command to copy and paste. You don't even have to type it!

You have probably just saved me.. minutes of time over the course of a year!

But seriously thanks, I was going into the known_hosts file and manually deleting the offending line :)

> SSH has.

IMHO no. We don't SSH to the same 46 servers everyday. But we do log into that many (or more) websites. Can you imagine the amount of homework users need to do in order for this to work?

Not to mention the amount of non-tech savvy users who just won't put up with it.

Quite the contrary: SSH's system means that you only have to "do your homework" when first connecting to the server. It seems I have 64 lines in my ~/.ssh/known_hosts (there are probably quite a few duplicates, because this seems high to me) and almost never have SSH tell me the key has changed and someone could be doing something nasty. When it does, I almost always know why, and when I don't then I try to contact the admin before connecting.

The way certificate authorities work though, you might visit your bank's "secure" website everyday, with its green padlock and company name displayed, but if one day a rogue authority or a compromised one issues a certificate to someone else, and your DNS resolves to a new server, your browser would not even tell you anything has changed and would happily display the green padlock like it always has.

In the current state of things, you have to do the homework yourself for every site you visit when using HTTPS, while you don't with SSH.

Or you can install Certificate Patrol (https://addons.mozilla.org/fr/firefox/addon/certificate-patr...). And then you'll cry at the amount of sites badly configured.

My browser also offers me to accept any self-signed certificate, I can investigate it and then I can accept it and it won't ever bother me again, until the certificate changes.

The problem is that this is a huge hassle for incidental visitors. Whereas SSH does not have incidental visitors. Same goes for email, if it's your own server, you know the cert to be the real one, and you can accept it, you're not bothered again.

Certificate Patrol can give you something like this for Firefox.

+1 for Certificate Patrol; used to use it until it got too annoying for me. Same with RequestPolicy; another great extension that is unfortunately a lot of work if you surf a lot, esp these days, when everything is hosting assets on CDNs.

I used to use EFF's SSL Observatory until I realized it spits out lots of extra http requests. X509 is inherently flawed/complex and adding a browser plugin to make it better feels wrong.