Questions tagged [yubikey]

YubiKey is an USB authentication key developed by Yubico.

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Missing link between Java javax.smartcardio and OpenPGP functionality

As I understand, Yubikey NEO in CCID mode can be used as a SmartCard. I connected it, configured using GnuPG and tested using Kleopatra: encrypted a text file. Is it possible to encrypt data with ...
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137 views

Can an infected endpoint steal private keys from a FIDO U2F Hardware Token / Yubikey?

Is it possible for an infected endpoint to steal private keys from a FIDO U2F Hardware Token / Yubikey? What attacks exist against these hardware tokens? What mitigations are possible? For the scope ...
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153 views

How to use master password for GPG encryption after setting up Yubikey? [closed]

I just setup my Yubikey 4 on Windows. How can I use master password for signing/encrypting when I don't have my key? If the yubikey is not inserted I get an error "Please insert the card with serial ...
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459 views

gpg2: How to get rid of “Please insert card with serial number”, getting the same key from a different card / Yubikey

I have multiple Yubikeys carrying the same GPG secret key. I want to switch from one Yubikey to anohter one on my laptop. The two obviously have different serial numbers. After switching the keys ...
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125 views

Is there a way to generate a Yubikey OTP without touch?

I'm trying to automate an authentication canary in a workflow that includes a mandatory Yubikey OTP (the 44-character unique password). Is there a way to configure a single Yubikey in such a way that ...
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247 views

Google account 2FA only with HW security key?

Is it possible to configure 2FA access to a Google account using only HW security key (e.g. Yubikey) without verification SMS code option ? It seems that SMS confirmation code is still primary 2FA ...
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1k views

Making 2 yubikeys generate the same password

Is their a way you can make two yubikeys generate the exact same password at the exact same time? (identical copy) I am wanting to purchase two of them so I am able to store a backup yubikey in a ...
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AWS - YubiKey lost… now what?

I just received my YubiKey and was playing with it. It works brilliantly but I couldn't help thinking what would happen if I would lose the key. Well, for Google you can print out some backup codes, ...
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125 views

How to use Yubikey 5 NFC for online accounts, Linux login, and KeePassXC?

I just got my Yubikey 5 NFC, and would like to use it for Linux desktop login Linux KeePassXC (which only supports hmac-sha1 challenge-response) online accounts When reading about U2F it seams to be ...
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113 views

Deterministic password generation using Yubikey

I like LastPass but having to have it as a browser plugin means an attacker could steal all my passwords at once. It makes a lot of sense to use a hardware device to store my passwords, like yubikey ...
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270 views

How to force GPG to use a Keycard when it is available

I have a yubikey (with PGP smartcard function) with my PGP key on it. I did not replace the private key on my main PC with a stub key as keytocard does by default, so I still can use the PGP key with ...
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455 views

Would it be possible to store Kerberos tickets on a YubiKey?

Kerberos supports different ways (ccache types) of storing tickets, such as: FILE MEMORY KEYRING I was wondering whether it would technically be possible to also store the Ticket-granting-ticket and ...
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1k views

Security of KeePass and Yubikey OATH-HOTP

How secure is KeePass in addition with a Yubikey with OATH-HOTP? I read in Yubikey with KeePass using challenge-response vs OATH-HOTP that with OATH-HOTP there isn´t added a real second factor. But ...
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177 views

WebCrypto, SOP and Yubikeys

I've been following some discussions on WebApp Security mailing list regarding WebCrypto and SOP policies (100+ messages). One of the things that kind of sprang out was keys held in WebCrypto were not ...
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46 views

Help using my yubikey with facebook

I just purchased a Yubikey 5 NFC. I want to use it to make my accounts a little more secure. I have added 2fa to my facebook account and I have added that key to my yubikey. So far, so good. Now I ...
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FIDO2 Windows vs Linux

I am using a Yubikey 5C as a MFA & smartcard for various application. On my Windows 10 desktop I have set up a FIDO2 PIN - so if I would like to use it within Firefox for example, I have to enter ...
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Looking for ability to identify U2F device

I know that in terms of security it is not good idea (as explained here: https://github.com/Yubico/libu2f-host/issues/45#issuecomment-337013420). But we can live with that. Is there any extension of ...
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71 views

Could a Hardware Token Defeat a Keylogger?

I would like to improve my understanding of keyloggers by asking what is feasible with current technology. That is, I mean to be asking a conceptual question that doesn't verge into sci-fi. My ...
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Is Yubikey HSM2 FIPS Compliant?

I searched for Yubico on this NIST validated modules but found only a module from the Yubico 4 series. (https://csrc.nist.gov/Projects/Cryptographic-Module-Validation-Program/Validated-Modules/Search) ...
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114 views

Is there any Password Manager that supports Hardware-Based OTP encryption/decryption?

I see that some projects like KeepassXC use CR based OTP to provide some additional security. While this is discussed quite controversial my opinion is that - for quite some cases (e.g. most non-...
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147 views

SSH AUTH : sekey vs yubikey vs ssh-keygen

I've been pondering/hacking/experimenting/using/misusing and am torn/puzzled over this for the past month or so; Which of these methods should prove themselves more secure/least susceptible to be ...
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1k views

Can Yubikey complement a TPM chip?

Does the functionality of an external hardware key overlaps 100% with the one provided by an embedded security chip on a laptop? Or can they complement each other? Although I assume an external key ...
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How secure is using a Yubikey to unlock a MacBook Pro with Filevault?

I just got a MacBook and am planning on using it with Filevault and a Firmware password. How secure would using a new Yubikey be while using it to login using the standard method if the computer gets ...

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