According to this discussion the Duo Mobile app can work as a passcode generator for other 2FA systems. Is the reverse also true? In other words, can I use a third-party 2FA application to generate passcodes that will work with Duo? Obviously, the a...

As I understand it, the logon passcode is generated from a standardized hashing algorithm based on the security key and either a counter (for HOTP) or the time (for TOTP). (It also must know it is SHA1 and how many digits, etc…) It must be standard ...