Getting Started with YubiKey 5Ci

Yubico SDK for iOS and Android

Are you developing an iOS or Android app and want to integrate strong authentication? Now you can with the YubiKey 5Ci, an industry-first dual connector security key with support for USB-C and Lightning.


Follow these guides to help you rapidly integrate open standards with your products and services.


Share ideas and find support in these online Yubico developer forums.

Ask technical questions Report bugs and request features Search knowledge base


Integrate the YubiKey with your product and services and submit for review to be listed as part of the "Works with YubiKey" program.

What's the Works with YubiKey program?

Learn More

Open Source

Yubico offers free and open source software for integrating strong authentication into your product or service. We also provide solutions for encrypting and securing secrets on your servers.