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A hacker got all my texts for $16

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Re: A hacker got all my texts for $16

#72

Lots of comments here along the lines of "SMS 2FA is bad", but hell, if the phone companies had an appropriate level of liability here (which should be a shit ton), this should be impossible. And it's not just about 2FA, most of humanity expects that if someone else texts them, those texts will go to their phone and only their phone unless they've given explicit verifiable consent. I mean, in this case all the hacker…

When they invented text messaging, heck even the phone system itself, did they provide anything that said there was an expectation of privacy? Not sure which is why I'm asking.

When cell phones first became big, probably 10-15 years ago at least, there was a website for my area I lived in at the time (southern Illinois) that would list texts and people could vote on the funniest ones. There were some really private messages that would hit the top (obviously phone numbers weren’t displayed.) So it used to be people had the assumption that texts were public, because for some carriers they basically were.

Re: A hacker got all my texts for $16

#73
post #66

In Australia it's mandated you're sent a message before rerouting or migrating to another provider. Surprised this isn't enforced in the other countries, it costs next to nothing to implement and is just an additional step in the account migration process. I'd love to see companies allow for opt in additional security measures, like banks or telco's calling me - having a verbal password to confirm things, that level…

I think this particular issue is specific to North America, due to peculiarities of the NANP phone number scheme (inter-provider texts are routed quite differently from voice calls, if I understand it correctly). In other countries, the two channels are more closely coupled (but SIM swap and/or number porting attacks are still possible, depending on the provider‘s security protocols).

SIM swaps are relatively easy in Australia, requiring only some fairly simple social engineering of staff in a phone store.

Number porting is trickier, requires a name and account number (or DOB in the case of a prepaid account) of the victim and they receive an SMS informing them their number was ported in advance.

Re: A hacker got all my texts for $16

#74
post #51

Lots of comments here along the lines of "SMS 2FA is bad", but hell, if the phone companies had an appropriate level of liability here (which should be a shit ton), this should be impossible. And it's not just about 2FA, most of humanity expects that if someone else texts them, those texts will go to their phone and only their phone unless they've given explicit verifiable consent. I mean, in this case all the hacker…

This would also be impossible if services stopped demanding your phone number to make an account. This is a growing trend in consumer services, and it's a privacy nightmare. Imagine if they demanded your SSN to sign up? A phone number is no different or less sensitive a unique identifier, perhaps even moreso these days. There are widespread reports of delivery businesses selling their phone number databases (with ass…

> Imagine if they demanded your SSN to sign up? A phone number is no different or less sensitive a unique identifier, perhaps even moreso these days.

I have extremely bad news for you. US Social Security Numbers are not in fact unique, and the fact they're "sensitive" is a terrible joke because it's pretty easy to discover the SSN for an individual based on public information, especially older people because SSNs weren't even randomised at issuance until relatively recently.

Any system that depends on keeping public facts secret is horribly broken, yes that also includes "verifying" credit cards based on a bunch of digits that are written right on the card itself.

Re: A hacker got all my texts for $16

#75
My strategy is to have a second phone that has Authenticator and is also the phone for any SMS based 2FA. The phone is locked in a file cabinet when not in use and never leaves my desk. An extra phone only costs me $10/month. Well worth the peace of mind.

Re: A hacker got all my texts for $16

#76

Too many services use phone numbers as the keys to the kingdom. It's a convenient and stable identifier, but holy shit it's not designed for security at all .

Agreed. Users have it in their power not to use services that require a phone number for SMS verifcation.

But we often don't. I just got my covid shot and with it a request to sign up for vsafe, which needs a phone number. (Which means i can't sign up since I have anti spam protection on and so their texts don't get through )

Re: A hacker got all my texts for $16

#77
post #8

Earlier quoted context omitted.

Nonsense. SMS is a great recovery factor, both for people who forget their password, and for those who lose access to their other second factors. (E.g. email address or a smartphone app). The thing that makes SMS uniquely good at this is that there is infrastructure around for people to replace their lost SIM cards, and that SMS available globally (vs regional identity systems like the bank ids in Nordic countries).…

Not being able to access your account for 3 days when you need to recover your password is not going to be a viable business decision for most services. I think you are SEVERELY underestimating how often the average user needs to recover their password.

tell me. On some little-used accounts of mine i need a new password for every login. Then there's one particular account which never lets me login. I have to make a new password every time...

Re: A hacker got all my texts for $16

#78
post #49

Earlier quoted context omitted.

Authenticator Apps?

The difficulty there is evaluating which ones are reliable, secure, and easy to use. I'd welcome recommendations.

Microsoft Authenticator is good, and there’s a reasonable chance they already use it at work.

Re: A hacker got all my texts for $16

#79

Voip.ms, vonage/twilio, et al let you set up an SMS capable number really quickly and cheaply, available globally... And you'd be fully in control

I think some platforms that use SMS 2fa explicitly ban this path for some reason. They can detect it and don't allow those numbers to be used.

It's a really backwards and confusing system, I agree.

Re: A hacker got all my texts for $16

#80

In Australia it's mandated you're sent a message before rerouting or migrating to another provider. Surprised this isn't enforced in the other countries, it costs next to nothing to implement and is just an additional step in the account migration process. I'd love to see companies allow for opt in additional security measures, like banks or telco's calling me - having a verbal password to confirm things, that level…

Someone is going to have to take one for the team and SIM swap a senator if we ever want that requirement in the states.
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