Meet the YubiKey by Yubico: the ultimate hardware security key for phishing-resistant multi-factor authentication (MFA). The YubiKey requires a physical touch to authenticate, eliminating the risk of remote attacks. The YubiKey functions by combining something you know (your password) with something you have (the physical YubiKey) to add an extra layer of security. The YubiKey can also store Passkeys, which replace passwords entirely.
Most cyber attacks begin with compromised account credentials, usually stolen usernames and passwords. Using a security key as two-factor authentication offers a straightforward and effective approach to safeguarding your identity, accounts and devices. Embraced by leading global brands and millions of users worldwide, the YubiKey remains a trusted choice for enhanced security.
For consumers:
- The highest level of phishing defense, yet easy to use, the YubiKey is your key to trust.
- Works out of the box with Google, Apple ID, Facebook, X, Dropbox, password managers, and hundreds of other services.
- The YubiKey works across both desktop and mobile with touch or tap-and-go authentication using USB or NFC.
- Eliminate the need to reach for your phone to open an app, or memorizing and typing in a code—simply touch the YubiKey to verify and you’re in.
- YubiKeys reduce the risk of unauthorized access to online accounts, emails, financial transactions, and sensitive information.
For businesses:
- Defend against phishing and credential theft with highest-assurance authentication.
- Enhance security for users across devices, including desktop and mobile.
- YubiKey hardware security keys reduce cyber risks and keep your intellectual property, customer data and financial information safe.
- Works out-of-the-box with enterprise systems like Google Workspace, Microsoft Entra ID, Identity Access Managers, password managers and hundreds of other services.
- Supports multiple protocols, including Smartcard/PIV and FIDO2, allowing for modern phishing-resistant authentication with device-bound passkeys.
*Note that Yubico recommends having a spare key
Q: What operating systems is the YubiKey 5Ci compatible with?
A: The YubiKey 5Ci is compatible with Windows, macOS, Ubuntu, Android, and iOS operating systems.
Q: Does the YubiKey 5Ci have both Lightning and USB-C connectors?
A: The YubiKey 5Ci has a dual connector for both Lighting and USB-C.
Q: What are the dimensions of the YubiKey 5Ci?
A: The YubiKey 5Ci has a height of 0.19 inches, a width of 1.58 inches, and a length of 0.47 inches.
Q: What are the different authentication and cryptography protocols supported by the YubiKey 5Ci?
A: The YubiKey 5Ci supports FIDO2, FIDO U2F, PIV, OATH, OpenPGP, and WebAuthn authentication and cryptography protocols.
Q: What is the warranty coverage for the YubiKey 5Ci?
A: The YubiKey 5Ci is covered by a 1-year limited manufacturer's warranty for both parts and labor.
Q: Can one key be used for multiple accounts at a time.
A: Yes, one YubiKey can be used for multiple accounts at a time, and this is one of its primary benefits.
Q: Is this an rfid key? Does it work by sensing body heat when touched? Thanks
A: Not sure about rfid on the 5Ci. There's a version that has USB C and NFC. The 5Ci has USB C and Lightning connection. As for body heat, the yubikey is activated by touching the 2 metal contacts along the long sides which generates the token. Shown with arrows on the picture
A: Thanks for your question! For more detailed help with this, we recommend reaching out directly to Yubico’s support team at yubico.com/support — they’ll be happy to assist you further!
Customers express satisfaction with the YubiKey 5Ci's portability, security, connectivity, compatibility, and overall performance. Users appreciate the ease of use and the unparalleled level of security it provides. The dual connectors and broad compatibility allow them to use it across all their devices. Overall, customers are pleased with how well the product works.
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.

Meet the YubiKey by Yubico: the ultimate hardware security key for phishing-resistant multi-factor authentication (MFA). The YubiKey requires a physical touch to authenticate, eliminating the risk of remote attacks. The YubiKey functions by combining something you know (your password) with something you have (the physical YubiKey) to add an extra layer of security. The YubiKey can also store Passkeys, which replace passwords entirely. Most cyber attacks begin with compromised account credentials, usually stolen usernames and passwords. Using a security key as two-factor authentication offers a straightforward and effective approach to safeguarding your identity, accounts and devices. Embraced by leading global brands and millions of users worldwide, the YubiKey remains a trusted choice for enhanced security. For consumers: - The highest level of phishing defense, yet easy to use, the YubiKey is your key to trust. - Works out of the box with Google, Apple ID, Facebook, X, Dropbox, password managers, and hundreds of other services. - The YubiKey works across both desktop and mobile with touch or tap-and-go authentication using USB or NFC. - Eliminate the need to reach for your phone to open an app, or memorizing and typing in a code—simply touch the YubiKey to verify and you’re in. - YubiKeys reduce the risk of unauthorized access to online accounts, emails, financial transactions, and sensitive information. For businesses: - Defend against phishing and credential theft with highest-assurance authentication. - Enhance security for users across devices, including desktop and mobile. - YubiKey hardware security keys reduce cyber risks and keep your intellectual property, customer data and financial information safe. - Works out-of-the-box with enterprise systems like Google Workspace, Microsoft Entra ID, Identity Access Managers, password managers and hundreds of other services. - Supports multiple protocols, including Smartcard/PIV and FIDO2, allowing for modern phishing-resistant authentication with device-bound passkeys. *Note that Yubico recommends having a spare key

Meet the YubiKey by Yubico: the ultimate hardware security key for phishing-resistant multi-factor authentication (MFA). The YubiKey requires a physical touch to authenticate, eliminating the risk of remote attacks. The YubiKey functions by combining something you know (your password) with something you have (the physical YubiKey) to add an extra layer of security. The YubiKey can also store Passkeys, which replace passwords entirely. Most cyber attacks begin with compromised account credentials, usually stolen usernames and passwords. Using a security key as two-factor authentication offers a straightforward and effective approach to safeguarding your identity, accounts and devices. Embraced by leading global brands and millions of users worldwide, the YubiKey remains a trusted choice for enhanced security. For consumers: - The highest level of phishing defense, yet easy to use, the YubiKey is your key to trust. - Works out of the box with Google, Apple ID, Facebook, X, Dropbox, password managers, and hundreds of other services. - The YubiKey works across both desktop and mobile with touch or tap-and-go authentication using USB or NFC. - Eliminate the need to reach for your phone to open an app, or memorizing and typing in a code—simply touch the YubiKey to verify and you’re in. - YubiKeys reduce the risk of unauthorized access to online accounts, emails, financial transactions, and sensitive information. For businesses: - Defend against phishing and credential theft with highest-assurance authentication. - Enhance security for users across devices, including desktop and mobile. - YubiKey hardware security keys reduce cyber risks and keep your intellectual property, customer data and financial information safe. - Works out-of-the-box with enterprise systems like Google Workspace, Microsoft Entra ID, Identity Access Managers, password managers and hundreds of other services. - Supports multiple protocols, including Smartcard/PIV and FIDO2, allowing for modern phishing-resistant authentication with device-bound passkeys. *Note that Yubico recommends having a spare key

Meet the YubiKey by Yubico: the ultimate hardware security key for phishing-resistant multi-factor authentication (MFA). The YubiKey requires a physical touch to authenticate, eliminating the risk of remote attacks. The YubiKey functions by combining something you know (your password) with something you have (the physical YubiKey) to add an extra layer of security. The YubiKey can also store Passkeys, which replace passwords entirely. Most cyber attacks begin with compromised account credentials, usually stolen usernames and passwords. Using a security key as two-factor authentication offers a straightforward and effective approach to safeguarding your identity, accounts and devices. Embraced by leading global brands and millions of users worldwide, the YubiKey remains a trusted choice for enhanced security. For consumers: - The highest level of phishing defense, yet easy to use, the YubiKey is your key to trust. - Works out of the box with Google, Apple ID, Facebook, X, Dropbox, password managers, and hundreds of other services. - The YubiKey works across both desktop and mobile with touch or tap-and-go authentication using USB or NFC. - Eliminate the need to reach for your phone to open an app, or memorizing and typing in a code—simply touch the YubiKey to verify and you’re in. - YubiKeys reduce the risk of unauthorized access to online accounts, emails, financial transactions, and sensitive information. For businesses: - Defend against phishing and credential theft with highest-assurance authentication. - Enhance security for users across devices, including desktop and mobile. - YubiKey hardware security keys reduce cyber risks and keep your intellectual property, customer data and financial information safe. - Works out-of-the-box with enterprise systems like Google Workspace, Microsoft Entra ID, Identity Access Managers, password managers and hundreds of other services. - Supports multiple protocols, including Smartcard/PIV and FIDO2, allowing for modern phishing-resistant authentication with device-bound passkeys. *Note that Yubico recommends having a spare key

Meet the YubiKey by Yubico: the ultimate hardware security key for phishing-resistant multi-factor authentication (MFA). The YubiKey requires a physical touch to authenticate, eliminating the risk of remote attacks. The YubiKey functions by combining something you know (your password) with something you have (the physical YubiKey) to add an extra layer of security. The YubiKey can also store Passkeys, which replace passwords entirely. Most cyber attacks begin with compromised account credentials, usually stolen usernames and passwords. Using a security key as two-factor authentication offers a straightforward and effective approach to safeguarding your identity, accounts and devices. Embraced by leading global brands and millions of users worldwide, the YubiKey remains a trusted choice for enhanced security. For consumers: - The highest level of phishing defense, yet easy to use, the YubiKey is your key to trust. - Works out of the box with Google, Apple ID, Facebook, X, Dropbox, password managers, and hundreds of other services. - The YubiKey works across both desktop and mobile with touch or tap-and-go authentication using USB or NFC. - Eliminate the need to reach for your phone to open an app, or memorizing and typing in a code—simply touch the YubiKey to verify and you’re in. - YubiKeys reduce the risk of unauthorized access to online accounts, emails, financial transactions, and sensitive information. For businesses: - Defend against phishing and credential theft with highest-assurance authentication. - Enhance security for users across devices, including desktop and mobile. - YubiKey hardware security keys reduce cyber risks and keep your intellectual property, customer data and financial information safe. - Works out-of-the-box with enterprise systems like Google Workspace, Microsoft Entra ID, Identity Access Managers, password managers and hundreds of other services. - Supports multiple protocols, including Smartcard/PIV and FIDO2, allowing for modern phishing-resistant authentication with device-bound passkeys. *Note that Yubico recommends having a spare key
| Pros for Yubico - YubiKey 5Ci - Two-Factor Authentication Security Key, Dual Connectors for Lightning/USB-C - FIDO Certified - Black | |||
|---|---|---|---|
| There were no pros for this product— | There were no pros for this product— | There were no pros for this product— |