Questions tagged [authenticator]
The authenticator tag has no usage guidance.
How to add Google Authenticator (TOTP) to a Google account? [closed]
I'd like to 2FA with Google Authenticator to my account, but when I want to add 2FA, Google only offers U2F security tokens but no TOTP option. Following the instructions on the official help page, I ...
How MS Authenticator works
When using MS Authenticator on a Microsoft account, the user fills in the email address or username. After that, the user presses one of the three numbers in the MS authenticator app and is logged in. ...
Is it secure to also make the mobile app client the authenticator app?
Most services that support it seem to have a standalone 2FA authenticator app (Microsoft Authenticator, Google Authenticator) instead of integrated authentication in their mobile apps (admittedly, ...
Is there any security reason to not allow adding authenticators for a certain account?
I have recently added 2FA for my Google account using an authenticator installed on my mobile phone. After doing this, I have realized that it would be nice to also have the authenticator installed in ...
Backup Google Authenticator transferring QR code
I understand that saving a screenshot of the QR code during the OTP setup process is enough to back up a single account, however, is this the same for the QR code generated during the Google ...
The Wrong Icon for NordVPN on Authy
I recently turned on the multi-factor authentication on NordVPN and I use Authy for the authenticator. After scanning the QR code on the website, I found that the icon displayed in the Authy app was ...
What is Threat Profile is Microsoft addressing with the MSAL URI format?
Applications built for MSAL 1.0 and MSAL 2.0 have a default application URI of MSAL://GUIDHere/AppName This is in contrast with what other IDP's are doing. Can anyone explain the benefits or drawbacks ...
Two factor verification apps IOS
I have an iPhone XR with the latest updates. I use Microsoft Authenticator for some 2 step verification for work related stuff. Today I enabled the Instagram two factor security option and choose the ...
How safe is my login system (conceptually)?
I implemented a 2FA authentication for a web app with PHP and Google Authenticator. In order to login to my system there are a few steps: User types in a complex master password in order to access ...
How do backup codes work in TOTP, like Google Authenticator?
My understanding is that in TOTPs are like HMAC where code is derived from time. However, I am struggling to understand the concept of Backup Codes in Google Authenticator, and how are they ...
What security considerations should be made when choosing a universal authenticator app? [closed]
The USPTO has two-step authentication: recommended applications comprise: Google Authenticator Microsoft Authenticator Oracle Authenticator Assume that I use my Gmail address as the USPTO username. ...
What point in Authenticator App 2FA when SMS fallback is enabled
I would like to move away from SMS 2FA (because of Should 2FA over SMS be considered insecure in the wake of recent SS7 attacks? for example). But some services that provide Authenticator apps ...
Which party stores the link between user and device in WebAuthn?
Looking at the online resources regarding WebAuthn, I still haven't been able to figure out which of the involved components (or parties) that store the link between the user and his/her authenticator ...
How does DUO push button method and other methods actually work?
Google authenticator uses HOTP and TOTP algorithm for TFA. What is the basic working principle of DUO push? What brings security to DUO push?
How does Google Authenticator interact with apps on an iPhone?
I am clear on how Google Authenticator works when logging on to a website and I am clear on that. However, these days everyone is using apps for everything. The Twitter app, the Facebook app, the ...
Do all Authenticator Apps use the same algorithm?
I've tried some Authenticator Apps (Google,Microsoft,Authy,Lastpass,...) and all of those apps generate same one time passwords at the same time ? So, these apps are use the same algorithm which is a ...
Having sudo mode in a web application, why use a password instead of one time passwords?
Online services, like GitHub, have Sudo mode. Sudo mode means, that a user performing delicate actions has only to authenticate every couple of minutes, but than again, although they are already ...
Where to find Google Authenticator backup codes?
I'm slightly confused about obtaining Google Authenticator backup codes. I can find my Google Account backup codes at: https://myaccount.google.com/signinoptions/two-step-verification But have no ...
What is a good method to authenticate users and make sure they don't give their credentials to someone else?
I'm new here I hope this is the right place to ask this question, I work at a call center and I've been asked to create a TimeClock system however we have the problem that agents share their ...
Does producing TOTP tokens weaken the stored secret? How much? [duplicate]
I am using Google Authenticator as a second factor on some sites, (including my Google Account). Every now and then I need to produce a token to log in. If some attacker received those tokens over ...
When should I issue more than one multi-factor device to a user? Is it OK to give several active tokens vs none at all?
Most of the conventional IT.Sec thinking I've seen says that a user can only have one multi factor authentication device. I'd like to challenge that defacto-thinking and ask if there is ever an ...