this post was submitted on 22 Nov 2023
499 points (98.6% liked)
Technology
58140 readers
4715 users here now
This is a most excellent place for technology news and articles.
Our Rules
- Follow the lemmy.world rules.
- Only tech related content.
- Be excellent to each another!
- Mod approved content bots can post up to 10 articles per day.
- Threads asking for personal tech support may be deleted.
- Politics threads may be removed.
- No memes allowed as posts, OK to post as comments.
- Only approved bots from the list below, to ask if your bot can be added please contact us.
- Check for duplicates before posting, duplicates may be removed
Approved Bots
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
You are not wrong, but you we should understand what class of attacks we are protecting against. Will biometrics stop your maid from using your device? Probably less. Will it stop the FBI? Not so sure.
Now, you may say, an FBI raid is not what you worry about on a daily basis. Agree.
If you are trying to keep the photos on your device safe from snooping, your good. Attacker needs the device and your fingerprint.
When we talk online accounts, I'd count device+fingerprint as one factor. Sure, the maid from the example above can't login into your gmail without your fingerprint, but most attacks are online. Your device sends a token to gmail, a cookie, a String; that's like a password. One factor.
Technically, it's slightly better than a password, because this token can be short-lived (although often it's not), could be cryptographic signature to be used exactly once (although...), you cannot brute-force guess the token.... But IF the token leaks, the attacker has full access (or enough to cause damage).
That's why I would suggest an independent second factor, such as password. Yes, a password. Not for your daily routine (biometrics+device is much better), but maybe for high-risk operations.
A sufficiently motivated maid will be able to do it. The FBI eats that kind of stuff for breakfast.
Once upon a time, the then German minister of the interior wanted to collect all kinds of biometric data, in passports, in fully connected databases, whatnot. The CCC went ahead and swiped his print off a glass at a reception and published a DIY version to impersonate him in their magazine. Fingerprint authorisation is the security equivalent of a sticky note with your password on your coffee mug.
The good news? You can use ordinary gloves, no need for tinfoil.
No, wrong. Still two factor because your fingerprint plus your device.
These authentication methods aren't as simple as the two factor Google Authenticator 6 digit number. They are cryptographically secure keys. Even if someone finds out what the token is, they still cannot send a valid request because they cannot generate a digitally signed request using the private key locked in your device's hardware, unlocked by your biometrics.
Passwords are inherently insecure and relatively easy to break. Digital signatures and secure tokens are almost unbreakable