From techcommunity.microsoft.com
In my blog Your Pa$$word doesn’t matter, I laid out the key password vulnerabilities, and in response to a gazillion “but other creds can be compromised, too” DMs and emails, I wrote All our creds are belong to us, where I outlined vulnerabilities in credentials other than passwords and highlighted the promise of passwordless, cryptographically protected creds like FIDO, Windows Hello, and the Authenticator App.
Today, I want to do what I can to convince you that it’s time to start your move away from the SMS and voice Multi-Factor Authentication (MFA) mechanisms. These mechanisms are based on publicly switched telephone networks (PSTN), and I believe they’re the least secure of the MFA methods available today. That gap will only widen as MFA adoption increases attackers’ interest in breaking these methods and purpose-built authenticators extend their security and usability advantages. Plan your move to passwordless strong auth now – the authenticator app provides an immediate and evolving option