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Contents

  • Introduction to the Different YubiKey Series
  • Firmware Overview
  • 5.7 Firmware Specifics
  • Firmware Specifics Prior to 5.6.x
  • Physical Attributes
  • Physical Interfaces: USB, NFC, Apple Lightning®
  • Understanding the USB Interfaces
  • Protocols and Applications
  • Tools and Troubleshooting
  • NFC ID Calculation Technical Description
  • Secure Channel Protocol (SCP03 and SCP11)
  • YubiKey 5 FIPS Series Specifics
  • YubiKey 5 CSPN Series Specifics
  • YubiKey Bio Series Specifics
  • Acronyms
  • Copyright
    • Trademarks
    • Disclaimer
    • Contact Information
    • Getting Help
    • Feedback
    • Document Updated
YubiKey Technical Manual
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Copyright

© 2021-2025 Yubico AB. All rights reserved.

Trademarks

Yubico and YubiKey are registered trademarks of Yubico AB. All other trademarks are the property of their respective owners.

Disclaimer

The contents of this document are subject to revision without notice due to continued progress in methodology, design, and manufacturing. Yubico shall have no liability for any error or damages of any kind resulting from the use of this document.

The Yubico Software referenced in this document is licensed to you under the terms and conditions accompanying the software or as otherwise agreed between you or the company that you are representing.

Contact Information

Yubico AB
Gävlegatan 22
113 30 Stockholm
Sweden

Getting Help

Documentation is continuously updated on https://docs.yubico.com/ (this site). Additional support resources are available in the Yubico Knowledge Base.

Click the links to:
  • Submit a support request
  • Contact our sales team

Feedback

Yubico values and welcomes your feedback. If you think you may have discovered a flaw in our product, please submit a support request at https://support.yubico.com/hc/en-us and provide as much detail as you can.

Document Updated

2025-04-09 16:36:15 UTC

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