1p1 by running ssh . I tried to "yubikey all the things" on Mac is with mixed results. 3. For the HID interface, see #90. This allows apps started from outside your terminal — like the GUI Git client, Fork. The YubiKey is a small hardware authentication device, created by Yubico, that supports a wide range of authentication protocols. When using the key for establishing a SSH connection however, there is no message about requiring to touch the key like on the Github blog Security keys are now supported for SSH Git. d/user containing user ALL=(ALL) ALL. I'm not kidding - disconnect from internet. Content of this page is not. Open a terminal. config/Yubico/u2f_keys sudo udevadm --version . service 🔐 Please enter security token PIN: Sep 30 18:02:34 viki systemd [1]: Starting. A Go YubiKey PIV implementation. d/sudo and add this line before auth. config/Yubico/u2f_keys to add your yubikey to the list of. Note: This article lists the technical specifications of the FIDO U2F Security Key. sudo apt-add-repository ppa:yubico/stable sudo apt update sudo apt install scdaemon yubikey-manager libpam-yubico libpam-u2f libu2f-udev; Change the pin to the Fido applicationYubikey 4 OTP+U2F+CCID (1050:0407) not working after attachment to WSL #139. sudo dnf makecache --refresh. Step 3. When there is a match on the rule, the user must correctly enter their smart card PIN before they can proceed. Before using the Yubikey, check that the warranty tape has not been broken. So thanks to all involved for. If you have several Yubikey tokens for one user, add YubiKey token ID of the other. Run sudo go run . Require Yubikey to be pressed when using sudo, su. At this point, we are done. Unable to use the Yubikey as method to connect to remote hosts via SSH. See moresudo udevadm --version . The current version can: Display the serial number and firmware version of a YubiKey. Never needs restarting. Lastly, configure the type of auth that the Yubikey will be. sh and place it where you specified in the 20-yubikey. write and quit the file. A PIN is stored locally on the device, and is never sent across the network. sudo apt-get install yubikey-personalization sudo apt-get install libpam-yubico Configure yubikey and passphrase. sudo apt-get update sudo apt-get install yubikey-manager 2. What is a YubiKey. Run `gpg2 --card-status` (if set up as a hardware token for GPG keys) Actual results: "systemctl status" journal logs: Jul 02 08:42:30 sgallaghp50. A new release of selinux-policy for Fedora 18 will be out soon. YubiKey. Run this. These commands assume you have a certificate enrolled on the YubiKey. Packages are available for several Linux distributions by third party package maintainers. 0-0-dev. The response should be similar to this: $ opensc-tool --list-readers # Detected readers (pcsc) Nr. Now, I can use command sudo, unlock the screen, and log in (only after logging out) with just my Yubikey. After updating yum database, We can. 这里需要用到 GPG 的配置，具体就参考之前的部落格吧，因为使用的是 GPG 的 ssh key 来进行认证。 这里假设已经配置好了，我们首先拿一下它的. Confirm libu2f-udev is already installed: sudo apt install libu2f-udev. It is complete. config/Yubico. Security policy Activity. Install the YubiKey Personalization tool; sudo add-apt-repository ppa:yubico/stable sudo apt-get update sudo apt-get install yubikey-personalization yubikey-personalization-gui Insert your Yubikey. For YubiKeys, especially older ones without FIDO2/U2F support, see the previous post titled “How to use a YubiKey with Fedora Linux“. This package is an alternative to Paul Tagliamonte's go-ykpiv, a wrapper for YubiKey's ykpiv. This application provides an easy way to perform the most common configuration tasks on a YubiKey. d/sudo: sudo nano /etc/pam. Bear in mind, setting an absolute path here is possible although very likely a fragile setup, and probably not exhibiting the intended. You can obtain the ID by opening a text editor and touching the button on the YubiKey, and selecting only the first 12. config/Yubico; Run: pamu2fcfg > ~/. The correct equivalent is /etc/pam. I can still list and see the Yubikey there (although its serial does not show up). I'd much rather use my Yubikey to authenticate sudo . (you should tap the Yubikey first, then enter password) change sufficient to required. Virtual FIDO is a virtual USB device that implements the FIDO2/U2F protocol (like a YubiKey) to support 2FA and WebAuthN. 3. pam_u2f. config/Yubico/u2f_keys When your Yubikey starts flashing just touch the metal part. A yubikey would work on longhold a password set to it but that would require multiple keys for multiple admin accountsusers (multiple rpis in my case). cfg as config file SUDO password: <host1. 2. d/sudo contains auth sufficient pam_u2f. For anyone else stumbling into this (setting up YubiKey with Fedora). Execute GUI personalization utility. Step by step: 1. so cue Run command below: $ pamu2fcfg -umaximbaz > ~/. Sorted by: 1. 2 # Form factor: Keychain (USB-A) # Enabled USB interfaces: OTP+FIDO+CCID # NFC interface is enabled. If you check GPG keys availible in WSL2 via gpg --list-keys or gpg --list-secret-keys you get empty results. Open settings tab and ensure that serial number visibility over USB descriptor is enabled. They are created and sold via a company called Yubico. Then enter a new Yubikey challenge passphrase, twice, then finally you will need to enter the backup passphrase one last time. Woke up to a nonresponding Jetson Nano. write and quit the file. YubiKey. Each user creates a ‘. Get SSH public key: # WSL2 $ ssh-add -L. The YubiKey is a hardware token for authentication. The YubiKey U2F is only a U2F device, i. config/Yubico $ pamu2fcfg -u $(whoami) >> ~/. d/sudo. U2F has been successfully deployed by large scale services, including Facebook, Gmail, Dropbox,. Touch Authentication - Touch the YubiKey 5 Series security key to store your credential on the YubiKey; Biometric Authentication - Manage PINs and fingerprints on your FIDO-enabled YubiKeys, as well as add, delete and rename fingerprints on your Yubikey Bio Series keys. Open the YubiKey Manager on your chosen Linux Distro. Ensure that you are running Google Chrome version 38 or later. Remove the key from the computer and edit /etc/pam. Run: mkdir -p ~/. Vault Authentication with YubiKey. I've tried using pam_yubico instead and sadly it didn't. Insert your personal YubiKey into a USB port on your terminal - the LED in the centre of the YubiKey button should. Then enter a new Yubikey challenge passphrase, twice, then finally you will need to enter the backup passphrase one last time. and add all user accounts which people might use to this group. YubiKey is a Hardware Authentication. Card Features Name 0 Yes Yubico YubiKey OTP+FIDO+CCID 00 00. If your udev version is lower than 244, to set up your Linux system: Verify that libu2f-udev is installed on your system. sudo apt install yubikey-manager Plug your yubikey inside the USB port. STEP 8 Create a shortcut for launching the batch file created in Step 6. Here's another angle. You will be presented with a form to fill in the information into the application. With a basic pubkey setup, compromise of the host is by far the biggest risk, even if the key. /etc/pam. fc18. Please login to another tty in case of something goes wrong so you can deactivate it. Regardless of which credential options is selected, there are some prerequisites: Local and Remote systems must be running OpenSSH 8. g. I register two YubiKey's to my Google account as this is the proper way to do things. : pam_user:cccccchvjdse. Is there any possible problems with this setup? I can think of one small issue: Granting cPanel support access to the servers. Export the SSH key from GPG: > gpg --export-ssh-key <public key id>. We have a machine that uses a YubiKey to decrypt its hard drive on boot. In many cases, it is not necessary to configure your. rules file. As someone who tends to be fairly paranoid when it comes to online security, I like the idea of using a hardware-based authentication device to store keys safely for things like code signing and SSH access. 10+, Debian bullseye+): Run ykman openpgp set-touch aut cached. Login as a normal non-root user. user@val:~$ cd yubikey-val user@val:~/yubikey-val$ sudo make install Depending on your distribution, the group of Apache (or the HTTP server) might be different from used in Debian and Ubuntu. config/Yubico/u2f_keys to add your yubikey to the list of accepted yubikeys. User logs in with email address for username and (depending on authentication preferences by user), password,tolken for the password (or if they have the app installed on their phone they can just type their password and click [Approve] on their phone. Run: pamu2fcfg >> ~/. Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly. yubikey_sudo_chal_rsp. 5-linux. In order to authenticate against GIT server we need a public ssh key. exe "C:wslat-launcher. To install the necessary packages, run:Programming the YubiKey in "OATH-HOTP" mode. These commands assume you have a certificate enrolled on the YubiKey. Necessary configuration of your Yubikey. These commands assume you have a certificate enrolled on the YubiKey. Starting with Chrome version 39, you will be able to use the YubiKey NEO or YubiKey NEO-n in U2F+HID mode. GnuPG Smart Card stack looks something like this. // This directory. An existing installation of an Ubuntu 18. It simplifies and improves 2FA. To write the new key to the encrypted device, use the existing encryption password. Local and Remote systems must be running OpenSSH 8. YubiKey 4 Series. Indestructible. Its flexible configuration. To add a YubiKey to more than terminal login, like local sshd servers, sudo or GDM login, add the respective auth include to one of the other configuration files in. Make sure multiverse and universe repositories enabled too. See Yubico's official guide. d/system-auth and added the line as described in the. ansible. . Like other inexpensive U2F devices, the private keys are not stored, instead they are symmetrically encrypted (with an internal key) and returned as the key handle. ), check whether libu2f-udev is installed by running the following command in Terminal: dpkg -s libu2f-udev This includes sudo, su, ssh, screen lockers, display managers, and nearly every other instance where a Linux system needs to authenticate a user. For the location of the item, you should enter the following: wscript. Manual add/delete from database. I then followed these instructions to try get the AppImage to work (. yubikey_users. Insert your YubiKey to an available USB port on your Mac. MFA Support in Privilege Management for Mac sudo Rules. | Włóż do slotu USB pierwszy klucz Yubikey i uruchom poniższe komendy. 2p1 or higher for non-discoverable keys. dmg file) and drag OpenSCTokenApp to your Applications. Once installed, you can import the key to slot 9a on your YubiKey using: ykman piv keys import 9a ~/. But all implementations of YubiKey two-factor employ the same user interaction. Enabling the Configuration. Install the OpenSC Agent. That is all that a key is. Distribute key by invoking the script. so) Add a line to the. pam_tally2 is counting successful logins as failures while using Yubikey. Reboot the system to clear any GPG locks. config/Yubico/u2f_keys. Using the YubiKey locally it's working perfectly, however sometimes I access my machine via SSH. sudo yubikey-luks-enroll -d /dev/sda3 -s 7 -c When prompted to Enter any remaining passphrase, use your backup passphrase - not the Yubikey challenge passphrase. sudo add-apt-repository -y ppa:. If you don’t have your YubiKey, it will give the following prompt: Security token not present for unlocking volume root (nvme0n1p3_crypt), please plug it in. wsl --install. so no_passcode. Downloads. This results in a three step verification process before granting users in the yubikey group access. The example below is the most common use of CSCF Two-Factor, becoming root on a CSCF managed system via the sudo command. Select Signature key . 1. I know I could use the static password option, but I'm using that for something else already. pkcs11-tool --list-slots. Verify your OpenSSH version is at least OpenSSH_for_Windows_8. wilson@spaceship:~$ sudo apt-get install -y gnupg-agent pinentry-curses scdaemon pcscd yubikey-personalization libusb-1. 主にデスクトップのために作られており、もっとも強力な生体認証オプションを提供するためにデザインされています。. I feel something like this can be done. Run: mkdir -p ~/. sudo . Warning! This is only for developers and if you don’t understand. The biggest differences to the original file is the use of the dm-tool (for locking the screen with lightdm) and the search term Yubico, since the Yubikey Neo is registered with „Yubico. WSL2 Yubikey Setup Guide. You can upload this key to any server you wish to SSH into. Preparing YubiKey. type pamu2fcfg > ~/. ssh/id_ed25519_sk. Defaults to false, Challenge Response Authentication Methods not enabled. sudo editor /etc/ssh/authorized_yubikeys Fill it with the username followed by a colon and the first 12 characters of the OTP of the yubikey. Make sure Yubico config directory exist: mkdir ~/. YubiKey 5 series. Essentially, I need to verify that the inserted YubiKey gives user proper authorization to use my application. If you run into issues, try to use a newer version of ykman (part of yubikey-manager package on Arch). Open the terminal and enter the following commands to update your packages and install YubiKey Authenticator and YubiKey Manager: sudo add-apt-repository. If you have a QR code, make sure the QR code is visible on the screen and select the Scan QR Code button. This will generate a random otp of length 38 inside slot 2 (long touch)! 3 posts • Page 1 of 1. Answered by dorssel on Nov 30, 2021. On Linux platforms you will need pcscd installed and running to be able to communicate with a YubiKey over the SmartCard interface. First try was using the Yubikey manager to poke at the device. A Go YubiKey PIV implementation. SoloKeys are based on open-source hardware and firmware while YubiKey's are closed source. If you're as excited as me about signing into your Linux server from your Windows machine and completely ditching passwords and private keys stored on your computer in the process then this is the one and true guide for you!I've been wanting to do this ever since I've bought my first two Yubikey NEO keys 4 years ago, but the. This is the official PPA, open a terminal and run. Any feedback is. WebAuthn is an API that makes it very easy for a relying party, such as a web service, to integrate strong authentication into applications using support built in to all leading browsers and platforms. Works with YubiKey. On Debian and its derivatives (Ubuntu, Linux Mint, etc. YubiKey 5 Series which supports OpenPGP. Once you have verified this works for login, screensaver, sudo, etc. To do this you must install the yubikey packages, configure a challenge-response slot on the Yubikey, and then configure the necessary PAM modules. Type your LUKS password into the password box. Run: sudo apt-get install libpam-u2f; 3 Associating the U2F Key(s) With Your Account. I've recently setup sudo to require the press of my YubiKey as 2FA via pam_u2f. Here is how to set up passwordless authentication with a Yubikey: sudo apt install libpam-u2f mkdir ~/. 3. If it's not running, run sudo service pcscd start; If it is running, run sudo service pcscd restartVim /etc/pam. Code: Select all. $ gpg --card-edit. Touch your Yubikey for a few seconds and save the command result to a configuration file, for example, /etc/u2f_mappings. Just run it again until everything is up-to-date. config/Yubico/u2f_keys. A PIN is actually different than a password. Now if I kill the sudo process from another terminal and immediately run sudo. ”. Every user may have multiple Yubikey dongles only make sure you are using different public UID's on every Yubikey dongle. Using the ykpasswd tool you can add delete yubikey entries from the database (default: /etc/yubikey). -DYKCS11_DBG=2 make sudo make install It is also possible to use PKCS#11 Spy, as provided by OpenSC,. signingkey=<yubikey-signing-sub-key-id>. service sudo systemctl start u2fval. For the other interface (smartcard, etc. ( Wikipedia) Yubikey remote sudo authentication. pam_u2f. Once the Yubikey admin pin code entered, the secret encryption key is in the Yubikey. sudo add-apt-repository ppa:yubico/stable && sudo apt-get update Just download and run the official AppImage. com> ESTABLISH SSH CONNECTION. socket To. It is very straight forward. $ mkdir -p ~/. Find a free LUKS slot to use for your YubiKey. Simply copy file to /usr/local/bin directory or your ~/bin/ using the cp command. Solutions. If you have a Yubikey, you can use it to login or unlock your system. Choose one of the slots to configure. But if i unlock the device after boot in a terminal it works fine (I have to enter the PIN and then touch the Yubikey): $ sudo systemctl start systemd-cryptsetup@luksx2df9310a75x2d5eadx2d43d8x2d8d55x2d0b33ba5e2935. The administrator can also allow different users. This project leverages a YubiKey HMAC-SHA1 Challenge-Response mode for creating strong LUKS encrypted volume passphrases. Step 2. Sorted by: 5. Run the personalization tool. 0-2 amd64 Personalization tool for Yubikey OTP tokens yubikey-personalization-gui/focal 3. After successfully completing all the steps, you can install the latest version of the software using the command in the terminal: apt install. $ sudo apt update ; sudo apt -y upgrade $ sudo apt -y install wget gnupg2 gnupg-agent dirmngr cryptsetup scdaemon pcscd secure-delete hopenpgp-tools yubikey-personalization Note Live Ubuntu images may require modification to /etc/apt/sources. PAM is used by GNU/Linux, Solaris and Mac OS X for user authentication, and by other specialized applications such as NCSA MyProxy. Add your first key. For ykman version 3. /install_viewagent. However as a user I don’t have access to this device and it is not showing up when executing “ykman list”. FIDO U2F was created by Google and Yubico, and support from NXP, with the vision to take strong public key crypto to the mass market. Reboot the system to clear any GPG locks. socket To restart the bundled pcscd: sudo snap restart yubioath-desktop. Note: In my opinion, you don't need to buy 2 YubiKeys if you back up your keys carefully. In case pass is not installed on your WSL distro, run: sudo apt install pass. First it asks "Please enter the PIN:", I enter it. This does not work with remote logins via SSH or other. Instead of having to remember and enter passphrases to unlock. Yubikey challenge-response mode for SUDO; FIDO U2F authentication; Yubikey for SSH authentication; Prerequisites. You'll need to touch your Yubikey once each time you. This should fill the field with a string of letters. Unplug YubiKey, disconnect or reboot. $ sudo apt update ; sudo apt -y upgrade $ sudo apt -y install wget gnupg2 gnupg-agent dirmngr cryptsetup scdaemon pcscd secure-delete hopenpgp-tools yubikey-personalization Note Live Ubuntu images may require modification to /etc/apt/sources. At this point, we are done. List of users to configure for Yubico OTP and Challenge Response authentication. " Now the moment of truth: the actual inserting of the key. Download the latest release of OpenSCToken. The last step is to setup gpg-agent instead of ssh-agent. sudo yubikey-luks-enroll -d /dev/sda3 -s 7 -c When prompted to Enter any remaining passphrase , use your backup passphrase - not the Yubikey challenge passphrase. 5-linux. YubiKey + Ansible Not working So I'll make this quick and simple for y'all and hopefully someone will be able to give me a direct answer. Open a second Terminal, and in it, run the following commands. workstation-wg. 2. Log into the remote host, you should have the pinentry dialog asking for the YubiKey pin. config/yubico/u2f_keys. “The YubiKey is a hardware authentication device manufactured by Yubico to protect access to computers, networks, and online services that supports one-time passwords (OTP), public-key cryptography, and authentication, and the Universal 2nd Factor (U2F) and FIDO2 protocols [1] developed by the FIDO Alliance. Card Features Name 0 Yes Yubico YubiKey OTP+FIDO+CCID 00 00. This will open gpg command interface. Retrieve the public key id: > gpg --list-public-keys. Users love the authentication experience and convenient form factor, driving Code Enigma to expand the YubiKey implementation to their ticketing and code management systems as well. Copy this key to a file for later use. d/sudo contains auth sufficient pam_u2f. h C library. . The purpose of the PIN is to unlock the Security Key so it can perform its role. The YubiKey 5 Series supports most modern and legacy authentication standards. d/common-auth file before all other entries to enable Yubikey 2FA: auth sufficient pam_yubikey. I get the blinking light on the Yubikey, and after pressing it, the screen goes black as if it is going to bring up my desktop, but instead it goes back to the log in. I've recently setup sudo to require the press of my YubiKey as 2FA via pam_u2f. Open Terminal. The pam_smartcard. sudo systemctl stop pcscd sudo systemctl stop pcscd. To do this, open a fresh terminal window, insert your YubiKey and run “sudo echo test”, you should have to enter your password and then touch the YubiKey’s metal button and it will work. On Debian and its. report. For sudo verification, this role replaces password verification with Yubico OTP. When your device begins flashing, touch the metal contact to confirm the association. If the user attempted to request a certificate for a different YubiKey or an SSH public key of a local key the Pritunl Zero server will reject the request. In the wrong hands, the root-level access that sudo provides can allow malicious users to exploit or destroy a system. 1 Test Configuration with the Sudo Command. A YubiKey have two slots (Short Touch and Long Touch), which may both be configured for different functionality. e. 5. The. yubioath-desktop`. The above PAM control value sufficient allows your YubiKey to act as an optional primary factor for sudo authentication. enter your PIN if one if set for the key, then touch the key when the key's light blinks. Since it's a PAM module, probably yes. Local Authentication Using Challenge Response. wyllie@dilex:~ $ sudo apt-get install -y curl gnupg2 gnupg-agent cryptsetup scdaemon pcscd yubikey-personalization dirmngr secure. For Debian/Ubuntu: sudo apt install yubikey-manager; Run ykman --version. Ensure that you are running Google Chrome version 38 or later. How the YubiKey works. Run sudo modprobe vhci-hcd to load the necessary drivers. YubiKey. 1 Answer. Planning is being done to enable yubikeys as a second factor in web applications and the like, but is not yet in place. 2. I’d like to use the new macOS app Secretive, which stores SSH keys in the Secure Enclave on newer MacBooks and requires Touch ID to authenticate. With a basic pubkey setup, compromise of the host is by far the biggest risk, even if the key. Generate the keypair on your Yubikey. sudo apt update sudo apt upgrade. sudo apt install pcscd sudo systemctl enable pcscd sudo systemctl start pcscd Now I can access the piv application on the yubikey through yubikey-manager. Under "Security Keys," you’ll find the option called "Add Key. YubiKey hardware security keys make your system more secure. Its main use is to provide multifactor authentication (MFA) when connecting to various websites that support it. yubioath-desktop/focal 5. Open a second Terminal, and in it, run the following commands. 2. kmille@linbox:~ ykman --version YubiKey Manager (ykman) version: 4. 24-1build1 amd64 Graphical personalization tool for YubiKey tokens. 499 stars Watchers. $ sudo apt install yubikey-luks $ sudo yubikey-luks-enroll -d /dev/nvme0n1p3 -s 1 You will be prompted for a challenge passphrase to use to unlock your drive as the first factor, with the YubiKey being the second factor. Open YubiKey Manager. Save your file, and then reboot your system. Now, if you already have YubiKey prepared under another Windows or Linux system, all you need to do is export public key from Kleopatra on that machine. sudo add-apt-repository ppa:yubico/stable && sudo apt-get update Now install libpam-u2f: sudo apt install libpam-u2f mkdir -p ~/. Export the SSH key from GPG: > gpg --export-ssh-key <public key id>. Lock the computer and kill any active terminal sessions when the Yubikey is removed. The server asks for the password, and returns “authentication failed”. and so interchangeable, is that correct? It all appears to be pretty far from being plug and play, often seeming to require a lot of additional software/modules to get specific things working. Since we have already set up our GPG key with Yubikey. Install GUI personalization utility for Yubikey OTP tokens. $ yubikey-personalization-gui. $ sudo apt update $ sudo apt -y upgrade $ sudo apt -y install wget gnupg2 gnupg-agent dirmngr cryptsetup scdaemon pcscd secure-delete hopenpgp-tools yubikey-personalization Note As of 2023 June, the hopenpgp-tools is not part of. This is working properly under Ansible 1. sgallagh. The YubiKey U2F is only a U2F device, i. For the PIN and PUK you'll need to provide your own values (6-8 digits). Using Pip. First, it’s not clear why sudo and sudo -i have to be treated separately. I've been using the instructions on Yubico's site, but now on Pop_OS! something is different. There are also command line examples in a cheatsheet like manner. sudo is one of the most dangerous commands in the Linux environment. Local Authentication Using Challenge Response. For example: sudo cp -v yubikey-manager-qt-1. so Now the file looks like this: Now when I run sudo I simply have to tap my Yubikey to authenticateAn anonymous reader writes: Folks at HexView (disclaimer: I contract for the company) took apart Yubikey Neo and found out that, while the key uses solid hardware to ensure secure identity management, its physical anti-tamper measures and durability could be improved. It generates one time passwords (OTPs), stores private keys and in general implements different authentication protocols. By using KeepassXC 2. If you don’t have your YubiKey, it will give the following prompt: Security token not present for unlocking volume root (nvme0n1p3_crypt), please plug it in. “The YubiKey is a hardware authentication device manufactured by Yubico to protect access to computers, networks, and online services that supports one-time passwords (OTP), public-key cryptography, and authentication, and the Universal 2nd Factor (U2F) and FIDO2 protocols [1] developed by the FIDO Alliance. Plug in YubiKey, enter the same command to display the ssh key. 1 Answer. 3. So basically if you want to login into your user account or use the sudo command you not only need to provide a passphrase but also have to touch the connected Yubikey. Use this to check the firmware version of your Yubikey: lsusb -v 2>/dev/null | grep -A2 Yubico | grep "bcdDevice" | awk '{print $2}' The libsk-libfido2. 7 Form factor: Keychain (USB-A) Enabled USB interfaces: OTP+FIDO+CCID NFC. with 3 Yubikey tokens: Let's install the yubikey-manager (and dependency pcscd) and make sure you can connect to the YubiKey: $ sudo apt update $ sudo apt install -y yubikey-manager $ ykman info Device type: YubiKey 5 NFC Serial number: 13910388 Firmware version: 5. Click the "Scan Code" button. Running “sudo ykman list” the device is shown. Login to the service (i. I’m using a Yubikey 5C on Arch Linux. com --recv-keys 32CBA1A9. The YubiKey is a hardware authentication device manufactured by Yubico to protect access to computers, networks, and online services that supports one-time passwords (OTP),. so is: It allows you to sudo via TouchID. The YubiKey 5Ci with Lightning connector and USB-C connector is priced at $75. Make sure to check out SoloKeys if you did not yet purchase your YubiKey(s).