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Questions tagged [multi-factor]

a multi factor authentication requires at least two sets of credentials. This is typically something you know (e. g. a password) and something you own (e. g. a token generator or mobile phone), but could also be something you are (a biometric).

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207 views

Web Application Using Identity Federation & OTP

We are running a web application using a client's identity federation to authenticate users. A new requirement is to use 2FA, we have decided to use an OTP algorithm using Java, similar to this one ...
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2answers
78 views

Can you use Google's authenticator app when Google “makes sure that you’re really you”?

I've heard that you can configure your Google account to use its (more secure) authenticator app rather than sending you a text message - in my most recent case, this was when Google sent me a text ...
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2answers
139 views

Is it a good idea to have a new laptop just to generate 2FA keys?

I am very concerned about people putting keyloggers or trojans on my computer. That can happen because I use my computers for many things. Work. Playing games. Watching movies. Accessing many ...
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1answer
509 views

Are Authy's tokens insecure?

I've been trying out Authy, a Google Authenticator alternative with an optional feature of being able to back up your tokens. They have two types of tokens: Authy-generated tokens and the regular OTP ...
5
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1answer
283 views

​Multi-factor Out of Band Token authentication options suitable as per NIST recommendations 800-63B (published in June, 2017)

In our web application project we are required to establish MF authentication with combination of memorised secret token (password) and Out of Bound token. Earlier we were planning to implement SMS ...
2
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1answer
1k views

Remote Registry allows bypass of 2FA enforcement with 1FA

Some organizations will configure their Windows systems to require Smart Cards for all account logins, as part of a two-factor authentication implementation. However, this can easily be bypassed ...
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1answer
191 views

Is using WebAuthn alone considered as two factor authentication?

Will using WebAuthn for an application make it two factor? I am specifically interested in using Ondevice biometrics and achieve passwordless authentication. For a true two factor authentication you ...
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1answer
83 views

Two Factor Authentication Multiple Devices

Most websites (that I have seen) that implement two factor authentication don't support multiple two factor authentication devices linked to one account. The biggest reasons I can think of for that ...
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1answer
36 views

Disable Office 365 2FA before period of leave without phone?

On enablement of 2FA in Office 365 Admin center, the only offered 2FA methods are Text message Call Notification in Authenticator app Passcode in Authenticator app Obviously, all of them require me ...
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1answer
82 views

What should be done if 2FA was turned off in an unexpected manner?

Today when I logged in Facebook, no 2FA was shown. I have been using SMS message as the second authentication factor. When I looked at the security settings, 2FA seemed to be disabled. I immediately ...
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1answer
72 views

Protecting third-party credentials in a web database in light of weak passwords

I need to store third party credentials in a database for a web application. The third party supports OAUTH and I plan on getting a long-lived token to allow my app to access the third party, but I ...
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1answer
129 views

What is optimal way to connect accounts to 2FA on phone?

I have Google Acc 0 (GAO) mostly for bank porpoises and some "official" services. This email basically "surname.name@google.com" and I put in my old C.V. and some other contact information. When I got ...
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0answers
167 views

U2F FIDO sends identifiable serial numbers

As all of the FIDO Alliance documents state, the FIDO U2F protocols should never be able to abused to identify whether a user has multiple accounts with one service, or for services to collude and ...
2
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0answers
64 views

Best practice for multi-factor re-authentication

We just introduced multi-factor authentication (MFA) to access a remote business network. This has a re-authentication option: to prompt the user to re-enter the password and MFA code periodically. ...
2
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0answers
39 views

2FA options for single yubikey and many hosts

I'm considering using yubikey (5 NFC model) as second factor for couple of Linux hosts. I'm interested in sticking it somewhere in PAM stack, so things like sudo are protected. Most of those hosts are ...
2
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0answers
115 views

Can SS7 attacks intercept SMS sent to a Google Voice number?

Hackers are able to steal 2FA SMS messages by exploiting SS7. As far as my understanding goes, this means gaining access to the SS7 system and then broadcasting a message akin to "This number is ...
2
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0answers
38 views

Protecting private keys of common chat applications with 2FA

Say a user uses a common chat application like Telegram, Signal, Whatsapp, Ricochet. His device gets hacked and private keys get stolen. For normal PGP usage with email you can use two factor ...
2
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0answers
64 views

How can I go about securing services that require SMS tokens as backups?

I use 2FA on all services that support it. I generate backup codes and store them in a secure encrypted location. Most services unfortunately require a SMS backup, which represents a security issue as ...
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0answers
122 views

Why does Gmail have separate form for backup codes?

When I log into Gmail with 2 factor authentication, I enter my username and password and get taken to a page asking me to enter a security code sent to a phone. If I enter a backup code into this form ...
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0answers
336 views

Why bother with security measures when IBAN is all it takes to transfer money from my account?

I have just learned that in Germany you pay online by providing your IBAN. In other words, anyone to whom I have sent money and therefore has my IBAN can extract money from my account. Apparently, the ...
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0answers
47 views

How to enforce E-mail Account Security with regards to Custom Domains & 2FA?

Lately I've been bothered by the fact that should one of my e-mail accounts be in some way compromised despite its long and randomized password phrase. I'd have hell to pay since it is effectively a ...
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0answers
659 views

OpenVPN use auth-user-pass with a file and authenticator

I have an open vpn configuration with the lines auth-user-pass my-login-creds.conf static-challenge "Enter Google Authenticator Code" 1 in it. When I try to connect with openvpn my-config.ovpn I ...
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0answers
40 views

Multi-factor asking condition

It is an established fact that the error message of login pages should not specify wether the password or the id is the problem. But for an application with multi factor authentication, should we ask ...
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0answers
57 views

Regarding 2 factor authentication and adding new devices. Which one of these is safer?

Let's say I have a mobile device with google authenticator which uses TOTP, which I use everytime to log in into my personal accounts. If I want to add a second device. I would need to have access to ...
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0answers
4k views

Soft tokens - multiple profiles on same smartphone

Some of our clients have started migrating to soft tokens instead of hardware ones for two-factor authentication to their network. We have apps like RSA SecurID and VIP Access on our smartphones. The ...
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0answers
32 views

User access control and management in AWS Environment

wondering what other SMBs are doing to manage dynamic access requirements for AWS platform. Currently we have 3 IAM roles (admin, dev, readonly) which users can choose after authenticating with https:...
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0answers
190 views

Two-factor authentication on Galaxy Watch - should secrets be encrypted, and is this SQLite example secure?

I recently got a Galaxy Watch and to get acquainted with developing apps for it I'm writing a simple two factor authenticator to generate TOTP codes from entered secrets using the Google Authenticator ...
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0answers
49 views

Leaking information about 2FA status

I was asked to provide a public web interface which is given an email addresses (which belong to our users) for public clients (e.g. a web application or native mobile application) whether or not a ...
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0answers
469 views

What are the security consequences of allowing 2FA app (Google Authenticator) to display the seed?

Excuse me if my question is a little bit convoluted. I prefer to share the full story, background information, so that accidentally I'm not asking XY question. Background info I'm using 2FA pretty ...