this post was submitted on 09 Apr 2024
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How is 25 bad? Do you need a passkey for each service /app/website? Can't you use the same key for many services? (trying to understand how they work)
Yes, you need a passkey per service, so you would quickly end up with your 25 slots full.
Ideally yes, they're supposed to eventually replace all passwords. Of which I have hundreds. And yes not 100% of them will do that on the near future but a lot more than 25 will.
/aparté: being downvoted for trying to understand gives me reddit vibes well done
Being down-voted for asking questions is bullshit. Your questions are valid and those people suck.
I have 150 passwords in my password manager. I’m not buying 7 YubiKeys (and to be fair that’s not what they’re designated for)
You only need one per website if you want it to autofill the username, because resident keys held on the security token can be recognized and suggested automatically but otherwise you must first enter your username on the website and let the website send its challenge value for the corresponding domain and account pair so that your security token can respond correctly.
Having a key shared across sites wouldn’t be great. If it was great it would be an article talking about “passkey” not “passkeys” because you would just have one. Like some sort of Skeleton Passkey that unlocks all your shit when compromised.
That's impossible. Passkeys were designed specifically to be impossible to share across different websites.
Well, that’s basically my point. It’s not a good idea.
Thank you ; I misunderstood that one passkey could be like a fingerprint sort of
No, sharing passkeys across services is way too risky. One service gets compromised, someone gets your passkey, and then they have access to all of your services. It's the same principle with regular passwords.
Uh, each service only has access to your public key, not the private one that stays with you. It's less risky than a regular password.
Even with U2F hardware keys where the server-side stores the encrypted key (to allow for infinite sites to be used with a single hardware key), it's only decryptable on your key and thus isn't that useful for someone who has compromised a service.
Thanks. I'm still learning about this "new" technology (which already is, what, eight years?)
It started with U2F which may be older?