# #Passkeys

- 3 Authors 27 Aug 2026 27 Aug 2026 ![](https://developer.android.com/static/blog/assets/ANDDM_Passkeys_Strapi_2fc9df18a8_Z28fFzY.webp) [Case Studies](https://developer.android.com/blog/categories/case-studies)

  ## [How WhatsApp Upgraded to Secure, Seamless Sign-In for 1 Billion Users with Passkeys](https://developer.android.com/blog/posts/how-whats-app-upgraded-to-secure-seamless-sign-in-for-1-billion-users-with-passkeys)

  [arrow_forward](https://developer.android.com/blog/posts/how-whats-app-upgraded-to-secure-seamless-sign-in-for-1-billion-users-with-passkeys) WhatsApp is the world's largest messaging platform, serving billions of users globally. It is the default communication tool for people across diverse regions, connecting users through private, reliable, and secure messaging.
  [Niharika Arora](https://developer.android.com/blog/authors/niharika-arora), [Tracy Agyemang](https://developer.android.com/blog/authors/tracy-agyemang), [Mayank Jain](https://developer.android.com/blog/authors/blog-author) • 8 min read
  - [#Passkeys](https://developer.android.com/blog/topics/passkeys)
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