- cross-posted to:
- linux@lemmy.ml
193
- cross-posted to:
- linux@lemmy.ml
Ricky Mondello (@rmondello@hachyderm.io)
hachyderm.ioIf you actually read the “Passkeys are a trap. Do not use them.” post going around, you’ll find a transparent attempt to clumsily string together a conspiracy.
The post is predicated on the idea that a feature of WebAuthn called “attestation”, which is only used in high-assurance and usually corporate scenarios, and usually with physical hardware security keys, will be leveraged to hurt people, somehow.
The post posits that a website like X will bait and switch users: first, you get a passkey. Then, later, scary “attested” passkeys! This simply isn’t possible to do because attestation isn’t supported on the web for mass market, consumer authentication.
Attestation for passkeys (software-based, syncable credentials) is antithetical to their mass market goals, and would freeze out independent, non-corporate-backed credential managers. It’s an explicit non-goal of the designers of passkeys, who work together in a forum anyone can join.
And trust me, websites and apps like banks repeatedly asked for attestation at the beginning of the industry’s passkey journey. The platforms, browsers, and credential management apps have held firm that the goal of passkeys is reducing phishing and **not** some kind of trusted computing scheme. (And I will note: over my dead body!)
Besides the theory of the case being fundamentally wrong, there are several things that make the post disqualifying in terms of arguing something useful or important in the realm of security, privacy, and user authentication:
1. Intentionally presenting things that are complicated as inherently suspicious. (Delivering security by design can be complicated, yes!)
2. Describing TOTP as a “great solution” for adding security to a password-based account. When the most common threat model on the web is phishing (a word the post never mentions!), TOTP hardly buys you _anything_. TOTP is phishable.
3. Seeming to be unbothered by how many logical leaps are being taken without actually understanding the topic being discussed.
There are bad things happening in tech and untrustworthy people and companies do exist, but they’re largely in the AI space, not the “let’s stop people we love from getting compromised through phishing” space.
A rebuttal to an anti-passkey, pro-TOTP post that has made the rounds on Lemmy as well.


After reading both of the posts, I’m kind of back where I started with passkeys: neutral. I’m pretty happy with my current setup of a self-hosted password manager, diceware master passphrase and strong, unique passwords for every account, along with an open source app for TOTP. I only ever see passkeys pushed on me for work-related accounts anyway, but I’m not using them there either. I do have a question though if someone can answer: are passkey protected logins also vulnerable to stolen session cookies?
Yes. 100% unchanged.
So it’s fair that you are neutral about them for your own use, clearly you know what you’re doing. It doesn’t make sense to be neutral about them, generally. On usability alone they are not good. There are so many people who don’t have a clue how they work, or their consequences, and just click okay when continually harassed into using them. Some will even go ahead and save one on a shared computers, or someone else’s, ‘because the website says so’.
Honestly, I don’t understand them well enough to recommend them either. I do IT, and I set my users up with a (managed) password manager and MS Authenticator. If I encounter a situation where a user has ended up with a passkey for a given service, I just leave it be. On the other hand, if someone is locked out because of a passkey, I reset it and get them set back up with the Authenticator app.