5 Debugging mode is disabled. HMAC-SHA1 Challenge-Response; Static Password; OATH-HOTP; USB Interface: OTP. The YubiKey then enters the password into the text editor. Programming the Yubikey with Challenge-Response mode HMAC-SHA1 (fixed 64 byte input!) using the Yubikey Personalization Tool seems to be incompatible using "standard. USING KeeChallenge works using the HMAC-SHA1 challenge response functionality built into the Yubikey. In practice, two-factor authentication (2FA). YubiKey can be used in several modes with KeeWeb: Challenge-response: to provide a hardware-backed component of master key; OATH: for generating one-time codes; Challenge-response. For challenge-response, the YubiKey will send the static text or URI with nothing after. Private key material may not leave the confines of the yubikey. 5 Debugging mode is disabled. Actual Behavior. serial-usb-visible: The YubiKey will indicate its serial number in the USB iSerial field. Post navigation. Challenge-Response An off-the-shelf YubiKey comes with OTP slot 1 configured with a Yubico OTP registered for the YubiCloud, and OTP slot 2 empty. Challenge-response authentication is automatically initiated via an API call. Remove your YubiKey and plug it into the USB port. In “authenticate” section uncomment pam to. g. I clicked “Add Additional Protection”, double-checked that my OnlyKey was open in the OnlyKey App, and clicked “Add Yubikey Challenge-Response”. I didn't think this would make a difference, but IT DOES!) One cannot use the same challenge response setting to open the same database on KeePassXC. For my copy, version 2. I have tested with Yubikey personalization tool and KeepassXC but if anyone would like to volunteer to test this out on additional apps please let me know and I will send some test firmware. YubiKey Personalization Tool shows whether your YubiKey supports challenge-response in the. ). Perhaps the Yubikey challenge-response (configured on slot 2) cannot be FWD, but reading the drduh guide, it seems possible to access some smartcard functionalities during/on remote. If button press is configured, please note you will have to press the YubiKey twice when logging in. FIDO2 standard now includes hmac-secret extension, which provides similar functionality, but implemented in a standard way. If you have a normal YubiKey with OTP functionality on the first slot, you could add Challenge-Response on the second slot. If you choose to authenticate locally then you configure slot 2 of your Yubikey in challenge response mode ( following the other tutorial ) The password prompt depends on how you configure sshd / pam _____-Tom. Existing yubikey challenge-response and keyfiles will be untouched. KeeWeb connects to YubiKeys using their proprietary HMAC-SHA1 Challenge-Response API, which is less than ideal. Open it up with KeePass2Android, select master key type (password + challenge-response), type in password, but. When the secret key is implanted, the challenge response is duplicated to each yubikey I implant it onto. xx) KeeChallenge, the KeePass plugin that adds support for Challenge-Response; Setup. 1 Introduction This guide covers how to secure a local Linux login using the HMAC-SHA1 Challenge-Response feature on YubiKeys. :)OTP, OATH-HOTP, Challenge-Response, and Static Password) that is loaded in each slot. 6 Challenge-response mode With introduction of the Challenge-Response mode in YubiKey 2. Multi-factor authentication (MFA) can greatly enhance security while delivering a positive user experience. Accessing this application requires Yubico Authenticator. Or it could store a Static Password or OATH-HOTP. fast native implementation using yubico-c and ykpers; non-blocking API, I/O is performed in a separate thread; thread-safe library, locking is done inside; no additional JavaScript, all you need is the . After successfully setting up your YubiKey in the Bitwarden webvault, and enabling WebAuthn for 2FA you will be able to login to the Bitwarden mobile app via NFC. YUBIKEY_CHALLENGE="enrolled-challenge-password" Leave this empty, if you want to do 2FA -- i. md","path. Protects against phishing, since the challenge-response step uses a signed challenge; the phishing site won't have the key, so the response step will fail. 2. HMAC-SHA1 Challenge-Response; Static Password; OATH-HOTP; USB Interface: OTP. The levels of protection are generally as follows:YubiKey challenge-response for node. Type password. YubiKey modes. Also, I recommend you use yubkiey's challenge-response feature along with KeepassXC. To do this. Select HMAC-SHA1 mode. Happy to see YubiKey support! I bought the Pro version as a thank you ️🙏🏻. Run: ykpersonalize -2 -ochal-resp -ochal-hmac -ohmac-lt64 -oserial-api-visibleThis key is stored in the YubiKey and is used for generating responses. Open Terminal. Using. Good for adding entropy to a master password like with password managers such as keepassxc. OATH. Start with having your YubiKey (s) handy. YubiKey Personalization Tool shows whether your YubiKey supports challenge-response in the lower right. This creates a file in ~/. Also, as another reviewer mentioned, make sure the Encryption Algorithm is set to AES-256 and the Key Derivation Function is set to AES. Perform a challenge-response style operation using either YubicoOTP or HMAC-SHA1 against a configured YubiKey slot. This lets you demo the YubiKey for single-factor authentication with Yubico One-Time Password. Configure a static password. CHALLENGE_RESPONSE, which accepts an extra byte [] challenge and returns an extra byte [] response. 4. If I did the same with KeePass 2. Private key material may not leave the confines of the yubikey. No need to fall back to a different password storage scheme. Question: Can i somehow validate the response using my yubico api private key? If not, it seems this authentication would be vulnerable to a man in the middle attack. yubico/authorized_yubikeys file that present in the user’s home directory who is trying to assess server through SSH. Edit : i try the tutorial mlohr (old way to do that, if i read correctly the drduh tutorial), using directly RemoteForward on command line -A -R, also. You will have done this if you used the Windows Logon Tool or Mac Logon Tool. So I use my database file, master. Perform a challenge-response operation. One-Time Password Mode: using the YubiKey in this mode is quite terrible in terms of UX, which is even worse on mobile devices. Context. Be sure that “Key File” is set to “Yubikey challenge-response”. It is my understanding that the only way you could use both a Yubi and a nitro to unlock the same db would be to use the static password feature on both devices. In other words, Slot 2 can store a Yubico OTP credential, or a Challenge-Response credential. For most configurations, you should be able to use the Applications > OTP menu in YubiKey Manager to. See moreHMAC-SHA1 Challenge-Response (recommended) Requirements. enter. YubiKey configuration must be generated and written to the device. Management - Provides ability to enable or disable available application on YubiKey. The YubiHSM secures the hardware supply chain by ensuring product part integrity. The proof of concept for using the YubiKey to encrypt the entire hard drive on a Linux computer has been developed by Tollef Fog Heen, a long time YubiKey user and Debian package maintainer. Account Settings. Cross-platform application for configuring any YubiKey over all USB interfaces. Must be managed by Duo administrators as hardware tokens. KeePass natively supports only the Static Password function. In order to use OnlyKey and Yubikey interchangeably both must have the same HMAC key set. In this case, the cryptographic operation will be blocked until the YubiKey is touched (the duration of touch does not matter). Perform a challenge-response operation. To use a YubiKey or OnlyKey for securing your KeePassXC database, you have to configure one of your YubiKey / OnlyKey slots for HMAC-SHA1 Challenge Response mode (see. As the legitimate server is issuing the challenge, if a rogue site or middle-man manipulates the flow, the server will detect an abnormality in the response and deny the. The YubiKey will wait for the user to press the key (within 15 seconds) before answering the challenge. The anomaly we detected is that the Yubikey Response seems to depend on the tool it was programmed (Yubikey Manager vs. Qt 5. KeeChallenge works using the HMAC-SHA1 challenge response functionality built into the Yubikey. In the list of options, select Challenge Response. “Implementing the challenge-response encryption was surprisingly easy by building on the open source tools from Yubico as well as the existing full disk. Add a Review Downloads: 0 This Week Last Update: 2016-10-30. Install YubiKey Manager, if you have not already done so, and launch the program. That said the Yubikey's work fine on my desktop using the KeepasXC application. Now add the new key to LUKS. If you've already got that and the configure button still reports "challenge-response failed" I'd like to know more about the flags set on your YubiKey. When unlocking the database ensure you click on the drop down box under "Select master key type" and choose "Password + challenge-response for KeePassXC". YubiKey/docs/users-manual/application-otp":{"items":[{"name":"application-concepts-overview. 5 beta 01 and key driver 0. kdbx created on the computer to the phone. When I tried the dmg it didn't work. You will then be asked to provide a Secret Key. Instead they open the file browser dialogue. An HMAC-SHA1 Challenge-Response credential enables software to send a challenge to the YubiKey and verify that an expected, predetermined response is returned. The size of the the response buffer is 20 bytes, this is inherent to SHA1 but can by changed by defining RESP_BUF_SIZE. Then indeed I see I get the right challenge response when I press the button. We start out with a simple challenge-response authentication flow, based on public-key cryptography. 2 and later. Two YubiKeys with firmware version 2. Commands. HMAC-SHA1 Challenge-Response. HMAC-SHA1 Challenge-Response; Static Password; OATH-HOTP; USB Interface: OTP. Note: This section can be skipped if you already have a challenge-response credential stored in slot 2 on your YubiKey. Yubikey needs to somehow verify the generated OTP (One Time Password) when it tries to authenticate the user. Display general status of the YubiKey OTP slots. Challenge-response - Provides a method to use HMAC-SHA1 challenge-response. 6. HOTP - extremely rare to see this outside of enterprise. Two-step login using YubiKey is available for premium users, including members of paid organizations (families, teams, or enterprise). First, configure your Yubikey to use HMAC-SHA1 in slot 2. Note that 1FA, when using this feature, will weaken security as it no longer prompts for the chalenge password and will decrypt the volume with only the Yubikey being present at boot time. The format is username:first_public_id:second_public_id:…IIUC, the Yubikey OTP method uses a hardcoded symmetric (AES) key that is known by Yubico. This option is only valid for the 2. The Response from the YubiKey is the ultimate password that protects the encryption key. YubiKey is a hardware authentication device that supports one-time passwords, public-key encryption and authentication, and the Universal 2nd Factor. (smart card), OATH-HOTP and OATH-TOTP (hash-based and time-based one-time passwords), OpenPGP, YubiOTP, and challenge-response. auth required pam_yubico. HMAC-SHA1 takes a string as a challenge and returns a response created by hashing the string with a stored secret. OATH. Note that Yubikey sells both TOTP and U2F devices. Using the challenge passphrase they could get the response from the Yubikey and store it, and then use it to decrypt the hard drive at any time without the Yubikey. Misc. I suspect that the yubico personalization tool always sends a 64 byte buffer to the yubikey. authfile=file Set the location of the file that holds the mappings of Yubikey token IDs to user names. The response from server verifies the OTP is valid. 9. The Yubikey appears to hang in random "timeout" errors even when it's repeatedly queried for version via ykinfo. 4. To enable challenge-response on your Yubikey in slot 2, type the following command: ykman otp chalresp -g 2 This configures slot 2 for challenge-response, and leaves slot 1 alone. You can add up to five YubiKeys to your account. Handle challenge-response requests, in either the Yubico OTP mode or the HMAC-SHA1 mode. The current steps required to login to a Yubikey Challenge-Response protected Keepass file with Strongbox are: generate a key file from the KDBX4 database master seed and HMAC-SHA1 Challenge-Response (see script above - this needs to be done each time the database changes) transfer the key to iOS,I used KeePassXC to set-up the challenge response function with my YubiKey along with a strong Master Key. So configure the 2nd slot for challenge-response: ykman otp chalresp --generate --touch 2. One could argue that for most situations “just” the push auth or yubikey challenge-response would be enough. An additional binary (ykchalresp) to perform challenge-response was added. Last edited by LockBot on Wed Dec 28, 2022 12:16 pm, edited 1 time in total. I have a Yubikey 5 NFC that I have recently configured with KeePass on Windows 10, using the KeeChallenge plugin, in HMAC-SHA1 Challenge-Response mode - (Using this Yubikey Guide and all works great). Debug info: KeePassXC - Version 2. Yubico has developed a range of mobile SDKs, such as for iOS and Android, and also desktop SDKs to enable developers to rapidly integrate hardware security into their apps and services, and deliver a high level of security on the range of devices, apps and services users love. Set "Key Derivation Function" AES-KDF (KDBX 4) after having this set to Argon 2 (KDBX 4) 3. serial-btn-visible: The YubiKey will emit its serial number if the button is pressed during power-up. For a new KeePass database, on the Create Composite Master Key screen, enter your desired master password, then check Show expert options, check Key file / provider, select YubiKey challenge-response, and click OK. Use Yubico Authenticator for Android with YubiKey NEO devices and your Android phones that are NFC-enabled. Use the Yubico Authenticator for Desktop on your Microsoft Windows, Mac (OS X and macOS), or Linux computers to generate OATH credentials on your YubiKeys. debug Turns on debugging to STDOUT mode=[client|challenge-response] Set the mode of operation, client for OTP validation and challenge-response for challenge-response validation, client is the default. You can also use the tool to check the type and firmware of a YubiKey, or to perform batch programming of a large number of YubiKeys. Please add funcionality for KeePassXC databases and Challenge Response. From KeePass’ point of view, KeeChallenge is no different. The key pair is generated in the device’s tamper-resistant execution environment, from where k priv cannot leave. Two YubiKeys with firmware version 2. Ensure that the challenge is set to fixed 64 byte (the Yubikey does some odd formatting games when a variable length is used, so that's unsupported at the moment). The YubiKey 5 series can hold up to 32 OATH credentials and supports both OATH-TOTP (time based) and OATH-HOTP. To confirm that you want to commit that new configuration to slot 1, press the y key and then the Enter key. And unlike passwords, challenge question answers often remain the same over the course of a. So yes, the verifier needs to know the. I use KeepassXC as my TOTP and I secure KeepassXC with Yubikey's challenge response. Qt 5. Which I think is the theory with the passwordless thing google etc are going to come out with. although Yubikey firmware is closed source computer software for Yubikey is open source. 5. The. Thanks for the input, with that I've searched for other solutions to passtrough the whole USB device and its working: The trick is to activate RemoteFX and to add the GUIDs from the Yubikey to the client registry. I don't know why I have no problems with it, I just activated 2fa in KeepassXC and was able to unlock my DB on my phone with "Password + Challenge. Can be used with append mode and the Duo. ago. In order to authenticate successfully, the YubiKey has to answer an incoming challenge with the correct response, which it can only produce using the secret. devices. This option is only valid for the 2. In Enter. A Yubikey, get one from: Yubico; A free slot on the Yubikey to be configured for. The first command (ykman) can be skipped if you already have a challenge-response credential stored in slot 2 on your YubiKey. Active Directory (3) Android (1) Azure (2). There are couple of technical reasons for this design choice which means that YubiKey works better in the mobile context particularly. 1. This is an implementation of YubiKey challenge-response OTP for node. I confirmed this using the Yubico configuration tool: when configured for a fixed length challenge my yubikey does NOT generate the NIST response, but it does if I set it to variable length. (Verify with 'ykman otp info') Repeat both or only the last step if you have a backup key (strongly recommended). I tried configuring the YubiKey for OTP challenge-response, same problem. the Challenge-Response feature turns out to be a totally different feature than what accounts online uses. Otherwise loosing HW token would render your vault inaccessible. Enter ykman info in a command line to check its status. so and pam_permit. Expected Behavior. Time based OTPs- extremely popular form of 2fa. Keepass2Android and. USB and NFC (YubiKey NEO required for NFC) are supported on compatible. Customize the LibraryThe YubiKey USB authenticator has multi-protocol support, including FIDO2, FIDO U2F, Yubico OTP, OATH-TOTP, OATH-HOTP, smart card (PIV), OpenPGP, and challenge-response capabilities, providing. 2 Revision: e9b9582 Distribution: Snap. Setting the challenge response credential. If you've already got that and the configure button still reports "challenge-response failed" I'd like to know more about the flags set on your YubiKey. In this case, the cryptographic operation will be blocked until the YubiKey is touched (the duration of touch does not matter). I transferred the KeePass. Management - Provides ability to enable or disable available application on YubiKey. This is a different approach to. Command APDU info. 1. Issue YubiKey is not detected by AppVM. YubiKey offers a number of personalization tools. By default, “Slot 1” is already “programmed. Click Interfaces. Also, as another reviewer mentioned, make sure the Encryption Algorithm is set to AES-256 and the Key. ), and via NFC for NFC-enabled YubiKeys. SmartCardInterface - Provides low level access to the Yubikey with which you can send custom APDUs to the key. So a Yubico OTP in slot 1 and a challenge response secret in slot 2 should work fine. It does so by using the challenge-response mode. Services using this method forward the generated OTP code to YubiCloud, which checks it and tells the service if it was ok. Thanks for the input, with that I've searched for other solutions to passtrough the whole USB device and its working: The trick is to activate RemoteFX and to add the GUIDs from the Yubikey to the client registry. ykpersonalize -v-2-ochal-resp-ochal-hmac-ohmac-lt64-ochal-btn-trig-oserial-api-visible #add -ochal-btn-trig to require button press. It was not working that good because sometimes the OtpKeyProv plugin did not recognize my input when i pressed the button too fast. Test your backup ways in, all of them, before committing important data to your vault, and always remember to keep a separate backup (which itself can be encrypted with just a complex password). Wouldn't it be better for the encryption key to be randomly generated at creation time - but for KeeChallenge to otherwise work as now. 2. HMAC SHA1 as defined in RFC2104(hashing) For Yubico OTP challenge-response, the key will receive a 6-byte challenge. Learn more > Solutions by use case. so modules in common files). Build the package (without signing it): make builddeb NO_SIGN=1 Install the package: dpkg -i DEBUILD/yubikey-luks_0. Select the configuration slot you want to use (this text assumes slot two, but it should be easy enough to adapt. YubiKey 2. After that you can select the yubikey. Both. The OS can do things to make an attacker to not manipulate the verification. For this tutorial, we use the YubiKey Manager 1. Scan yubikey but fails. Please make sure that you've used the YubiKey personalization tool to configure the key you're trying to use for hmac-sha1 challenge-response in slot 2. I followed a well-written post: Securing Keepass with a Second Factor – Kahu Security but made a few minor changes. If the Yubikey is plugged in, the sufficient condition is met and the authentication succeeds. While Advanced unlocking says in its settings menu that it Lets you scan your biometric to open the database or Lets you use your device credential to open the database, it doesn't replace authentication with a hardware token (challenge-response), whereas I expected. Set up slot 2 for the challenge-response mode: ykman otp chalresp -t -g 2. Next we need to create a place to store your challenge response files, secure those files, and finally create the stored challenge files:Databases created with KeepassXC and secured with password and Yubikey Challenge Response don't trigger the yubichallenge app. Manage certificates and PINs for the PIV ApplicationYubiKey in Challenge/Response mode does not require network access in the preboot environment The sections below will walk us through how two-factor authentication using Yubikey in Challenge/Response mode can be implemented to work seamlessly with FDE implementations. Each operates differently. OATH. The database format is KDBX4 , and it says that it can't be changed because i'm using some kdbx4 features. To grant the YubiKey Personalization Tool this permission:Type password. The YubiKey needs to be configured with our Personalization Tools for HMAC-SHA1 challenge-response with variable input in slot 2. OK. Yes, it is possible. 2, there is . The YubiKey firmware does not have this translation capability, and the SDK does not include the functionality to configure the key with both the HID and UTF representations of a static password during configuration. The default is 15 seconds. (Edit: also tested with newest version April 2022) Note While the original KeePass and KeePassXC use the same database format, they implement the challenge-response mode differently. 4. Categories. YubiKey challenge-response USB and NFC driver. This also works on android over NFC or plugged in to charging port. Yubikey to secure your accounts. websites and apps) you want to protect with your YubiKey. To use the YubiKey for multi-factor authentication you need to. KeeChallenge 1. AppImage version works fine. KeePass enables users to store passwords in a highly-encrypted database, which can only be unlocked with one master password and/or a key file. The YubiHSM secures the hardware supply chain by ensuring product part integrity. If it does not start with these letters, the credential has been overwritten, and you need to program a new OTP. Two-step Login via YubiKey. Note: This section can be skipped if you already have a challenge-response credential stored in slot 2 on your YubiKey. . A Security Key's real-time challenge-response protocol protects against phishing attacks. It should start with "cc" or "vv". The YubiKey can be configured with two different C/R modes — the standard one is a 160 bits HMAC-SHA1, and the other is a YubiKey OTP mimicking mode, meaning two subsequent calls with the same challenge will result in different responses. YubiKey 5Ci and 5C - Best For Mac Users. HMAC-SHA1 Challenge-Response; Static Password; OATH-HOTP; USB Interface: OTP. Your Yubikey secret is used as the key to encrypt the database. The U2F application can hold an unlimited number of U2F credentials and is FIDO certified. Yes, the response is totally determined by the secret key and challenge, so both keys will compute identical responses. Please be aware that the current limitation is only for the physical connection. To grant the YubiKey Personalization Tool this permission:That is why it is called Challenge/Response. Use the KeeChallenge plugin with Keepass2 on the Desktop, and the internal Challenge. kdbx) with YubiKey. Command APDU info P1: Slot P1 indicates both the type of challenge-response algorithm and the slot in which to use. If they gained access to your YubiKey then they could use it there and then to decrypt your. 0 from the DMG, it only lists "Autotype". If you have a YubiKey with Challenge-Response authentication support, take a look at the Yubico Login for Windows Configuration Guide, which will allow you to set up MFA on. USB Interface: FIDO. YubiKey SDKs. Send a challenge to a YubiKey, and read the response. Also if I test the yubikey in the configuration app I can see that if I click. Hence, a database backup can be opened if you also store its XML file (or even any earlier one). so, pam_deny. . it will break sync and increase the risk of getting locked out, if sync fails. HMAC Challenge/Response - spits out a value if you have access to the right key. Command. Open it up with KeePass2Android, select master key type (password + challenge-response), type in password, but. 7. Serial number of YubiKey (2. What is important this is snap version. 5 with Yubikey Neo and new Yubikey 5 NFC KeePass 2. J-Jamet moved this from In progress to To do in 3. 3: Install ykman (part of yubikey-manager) $ sudo apt-get install yubikey-manager. KeeChallenge has not been updated since 2016 and we are not sure about what kind of support is offered. The Yubikey in this case is not MFA because the challenge-response mode does not require the use of a passcode in addition to the CR output. In the SmartCard Pairing macOS prompt, click Pair. Need help: YubiKey 5 NFC + KeePass2Android. 6 YubiKey NEO 12 2. In the SmartCard Pairing macOS prompt, click Pair. In KeePass' dialog for specifying/changing the master key (displayed when. Configuration of FreeRADIUS server to support PAM authentication. YubiKey 4 Series. The mechanism works by submitting the database master seed as a challenge to the YubiKey which replies with a HMAC-SHA1. Na 2-slot long touch - challenge-response. YubiKey FIPS (4 Series) CMVP historical validation list; Infineon RSA Key Generation Issue - Customer Portal; Using YubiKey PIV with Windows' native SSH client; Ubuntu Linux 20+ Login Guide - Challenge Response; YubiKey 5 Series Technical Manual; YubiKey FIPS (4 Series) Deployment Considerations; YubiKey 5 Series Quick Start GuideOATH-HOTP. 1 Inserting the YubiKey for the first time (Windows XP) 15. First, configure your Yubikey to use HMAC-SHA1 in slot 2. so modules in common files). KeeChallenge encrypts the database with the secret HMAC key (S). To set up the challenge-response mode, we first need to install the Yubikey manager tool called ykman. The . The YubiKey can be configured with two different C/R modes — the standard one is a 160 bits HMAC-SHA1, and the other is a YubiKey OTP mimicking mode, meaning two subsequent calls with the same challenge will result in different responses. Perhaps someone who has used the tool can explain the registration part for the login tool; the documentation seems to indicate you just put the configured key in and the tool basically magically learns the correct challenge-response data. Program an HMAC-SHA1 OATH-HOTP credential. This means you can use unlimited services, since they all use the same key and delegate to Yubico. Click Challenge-Response 3. There are two slots, the "Touch" slot and the "Touch and Hold" slot. Currently AES-256, Twofish, Tripple DES, ChaCha20, Salsa20 are options available to encrypt either of the 2 streams. intent. The SDK is designed to enable developers to accomplish common YubiKey OTP application configuration tasks: Program a slot with a Yubico OTP credential; Program a slot with a static password; Program a slot with a challenge-response credential; Calculate a response code for a challenge-response credential; Delete a slot’s configuration3 Configuring the YubiKey. The rest of the lines that check your password are ignored (see pam_unix. :)The slots concept really only applies to the OTP module of the YubiKey. 40, the database just would not work with Keepass2Android and ykDroid. Initialize the Yubikey for challenge response in slot 2. Available YubiKey firmware 2. ). so, pam_deny. This mode is used to store a component of master key on a YubiKey. HMAC-SHA1 Challenge-Response; Static Password; OATH-HOTP; USB Interface: OTP. From the secret it is possible to generate the Response required to decrypt the database. Use "client" for online validation with a YubiKey validation service such as the YubiCloud, or use "challenge-response" for offline validation using YubiKeys with HMAC-SHA-1 Challenge-Response configurations. 4. Make sure to copy and store the generated secret somewhere safe. To allow the YubiKey to be compatible across multiple hardware platforms and operating systems, the YubiKey appears as a USB keyboard to the operating system. The YubiKey firmware does not have this translation capability, and the SDK does not include the functionality to configure the key with both the HID and UTF representations of a static password during configuration. PORTABLE PROTECTION – Extremely durable, waterproof, tamper resistant,Because both physical keys use the same challenge-response secret, they should both work without issue. Keepassium is better then StrongBox because Keepassium works with autofill and yubikey. 1. Support is added by configuring a YubiKey slot to operate in HMAC-SHA1 challenge-response mode. Challenge-Response Mode General Information A YubiKey is basically a USB stick with a button. So it's working now. If I did the same with KeePass 2.