this post was submitted on 16 Sep 2023
-10 points (43.1% liked)
Memes
44901 readers
3741 users here now
Rules:
- Be civil and nice.
- Try not to excessively repost, as a rule of thumb, wait at least 2 months to do it if you have to.
founded 5 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
I like yubikeys since it means I don't have to pull out my phone. totp on the laptop also works well enough.
sms based 2fa is the worst. it seems like to me every ceo and other non-technical c-level person I've known personally loves sms based 2fa though because they can't figure anything else out.
They like it because it’s cheap and easy. They pay a phone provider for the 4 digit phone number and type in a script to generate a random code and text it. There is no oversight or maintenance.
Pairing with an Authenticator app is easy, but a little more work. Pairing with a mobile app can get a little tougher and require development plus maintenance in making sure the app cannot be spoofed and works with updates. Using a physical drive for 2FA is a pain in the ass to set up. From a business standpoint, 2FA only needs to work enough to remove liability from your business. If someone spoofs your cellphone number that’s on the phone provider not them so that’s enough to remove liability
Microsoft gave the option to call and you hit pound. I prefered that overall. works with any kind of phone.
Phone numbers can be spoofed and calls can be redirected. Or, even better, conditional call forwarding is supported by most carriers. It can be set up and you’ll never know. Then they get the phone call and not you
and smart phones can be hacked. the point of two factor is they have to control both parts.
Right but the point they're making is it's a lot easier for a third party to intercept a code that has to be sent to you than it is for them to get the code from an authenticator app since they're generated on your device. At that point you pretty much need physical access to the phone.
im osrry so a hacked device would not show the authenticator code? I really don't see the difference here. Again its not each bit being so un breachable as much as they would have to have to breach both parts. I really don't think its taht easy to redirect all the calls that are supposed to go to my phone.
One is much easier to accomplish than the other and doesn't give the target the same chance to realize something is going on.
I don't think thats necessarily true. If diverting phonecalls were so easy there are a bunch of reasons outside of two factor attacks that it would be used for.
There actually are lots of things it's been used for in addition to stealing 2FA codes. SMS based 2FA is better than no 2FA at all, but it's insecure and not recommended to be used when dedicated authenticators are available instead. The NIST has warned against their use since 2016.
you seem to be limiting it to sms. you do realize your talking to a person who mentioned microsofts option to call you and you hit pound. They actually have an app where you input a two digit number and if anything I would have liked them to expand the phone call function with that. Anyway I was not speaking about sms but I still feel the vulnerabilities are overblown when used with a good password.
That's semantics, the same insecurities apply to all telephone based methods. I personally wouldn't want my phone company's customer service to play any role in my online security. Even Microsoft wants people to stop using them.
yes microsoft was the one I was complaining about but you can't redirect phone calls in the same way as sms and sms itself is mostly vulnerable due to legacy things that they could stop using and finally that article was not just 2 factor but bringing in using sms for a password reset which is really insecure but unrelated to 2factor. 2factor will always be safer than non 2 factor because more has to be done than just the one side.
You can, the concern here is with people, not the specifications of SMS. People can be social engineered to give control of your phone number to someone else. It's happened before, it's not a hypothetical, and it's why security experts advise against using phone based methods.
Im pretty sure that you would realize something was wrong with your phone then and its useless to them 2factor wise unless they have your password.