One-time passwords (OTPs) are a common way to add an extra layer of security to an authentication process, but they can still be vulnerable to attacks and are not recommended as a sole means of authentication in a passwordless strategy.
OTPs rely on the assumption that the user receives the code securely, either through SMS or an authenticator app. However, this assumption can be flawed if the user’s phone or device is compromised or if there is a vulnerability in the system that allows the attacker to intercept the OTP. Additionally, OTPs can be lost, forgotten, or delayed, causing frustration for the user and potentially leading to security breaches.
A passwordless strategy that relies solely on OTPs may also not meet the needs of all users, particularly those with accessibility needs who may have difficulty receiving or entering OTPs.
Therefore, it is recommended to use OTPs in combination with other secure authentication methods, such as biometrics or push notifications, rather than relying solely on them as part of a passwordless strategy.