Time-based one-time passwords (TOTP) with OpenLDAP

Two-factor authentication (2FA) is a method of enhancing the security of online accounts by requiring two types of credentials: something you know, such as a password, and something you have, such as a device. One common way of implementing the second factor is using time-based one-time passwords (TOTP), which are unique numeric codes that are generated based on the current time and a shared secret key. TOTP codes are usually displayed by an authentication app on your smartphone or tablet, …

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