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> you need to call them up to reset this My bank sent me a super key (some colorful QR code) to setup new 2FA devices, which I need to securely store somewhere
by Double_a_92 4y ago
> you need to call them up to reset this
My bank sent me a super key (some colorful QR code) to setup new 2FA devices, which I need to securely store somewhere.
- cube00 4y agoIt's interesting that a super key even exists. Normally the enrolment QR codes are one time use only.
- gunapologist99 4y agoThis is incorrect. A standard TOTP QR code can be used on multiple devices or saved and printed (and stored in a safe or something). There is no expiration date encoded in the QR; it is simply the shared secret for the TOTP app to use and some extra metadata like labels. See https://www.rfc-editor.org/rfc/rfc6238 https://www.rfc-editor.org/rfc/rfc6238 It is a good idea to enroll multiple devices as a backup against failure, or to store it somewhere safe.