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How could one use multi-factor authentication to derive a static secret key?

Scenario: The setup is that each user has a randomly generated key A used for encrypting data stored on the server and a password-derived key B used to store A on the server without the server getting ...
1 vote
3 answers
3k views

What is the best practice for resetting multi-factor when a user requests to recover their password?

I am in the process of developing a web-application which requires MFA on every login. (On the first login, before you can do anything, you are forced to setup MFA. Due to monetary restrictions and ...
14 votes
2 answers
13k views

How does password reset work if 2FA is enabled?

(There is a highly related question, however I believe mine is not a duplicate, since it deals with resetting a password without access to the account, not changing it while being logged in.) Say ...