![]() ![]() Go to the security settings of the service that you want to use the app with,.Install the authenticator app on your smartphone,.Fortunately, there is a better way: One-time codes can be generated on the fly using a small and (usually) very simple authenticator app. There’s an app for that, too: Authenticator appsīesides all the “ones” in this sentence, a one-time generated set of one-time codes has one drawback: Sooner or later it will come to an end, and you might be left codeless at the most inopportune moment. It’s not all that important whether the codes are kept in physical or digital format - what matters is that they (1) do not get lost and (2) cannot be stolen. Or, even simpler, they can be saved in encrypted notes in a password manager. These codes can be printed off or scribbled down and put in a safe. It’s quite straightforward: On request, the service generates and displays a dozen or so one-time-use codes that can later be used to authenticate a login. Even for good ol’ Facebook, this method may well do, especially as a backup plan. It is not the worst option, especially for services that you log into infrequently. The simplest way to replace SMS-based one-time passwords is to use, yes, one-time passwords, but prepared in advance. So it makes sense to scan the horizon for alternatives when it comes to 2FA, which is today’s topic. On the whole, SMS passwords are not very secure, and sometimes they are very insecure. With that said, we’re dealing not with hypotheticals, but a live threat. Note that even the most high-tech and labor-intensive of the above SMS password-stealing methods (SS7 exploitation) has already been used in practice. SMS messages with passwords can be intercepted through a basic flaw in the SS7 protocol used to transmit the messages.SMS messages will then go to this card, and the victim’s phone will be disconnected from the network. Using various underhanded tactics (persuasion, bribery, etc.), criminals can get hold of a new SIM card with the victim’s number from a mobile phone store.Password-bearing SMS messages can be intercepted by a Trojan lurking inside the smartphone.Even if notifications are turned off, a SIM card can be removed and installed in another smartphone, giving access to SMS messages with passwords.It’s easy to sneak a peek at passwords sent by SMS if lock-screen notifications are enabled.Sad to say, this is not the most reliable option. However, the talk is still largely confined to using 2FA for one-time passwords over SMS. In the past couple of years, the concept of two-factor authentication (2FA), long the preserve of geeks, has found its way into the mainstream. ![]()
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