Skip to main content

POST 2FA SMS

Thanks to Richard van Arnholt for pointing out to me that

NIST now states that if authentication is used via sms (out-of-band), ‘the verifier SHALL verify that the pre-registered telephone number being used is associated with a specific physical device. […] Verifiers SHOULD consider risk indicators such as device swap, SIM change, number porting, or other abnormal behavior before using the PSTN to deliver an out-of-band authentication secret.’

xxx

Comments

Post a Comment

Popular posts from this blog

We could fix mobile security, you know. We don't, but we could

Earlier in the week I blogged about mobile banking security , and I said that in design terms it is best to assume that the internet is in the hands of your enemies. In case you think I was exaggerating… The thieves also provided “free” wireless connections in public places to secretly mine users’ personal information. From Gone in minutes: Chinese cybertheft gangs mine smartphones for bank card data | South China Morning Post Personally, I always use an SSL VPN when connected by wifi (even at home!) but I doubt that most people would ever go to this trouble or take the time to configure a VPN and such like. Anyway, the point is that the internet isn’t secure. And actually SMS isn’t much better, which is why it shouldn’t really be used for securing anything as important as home banking. The report also described how gangs stole mobile security codes – which banks automatically send to card holders’ registered mobile phones to verify online transactions – by using either a Trojan...
Post a Comment
Read more