Trusted User Interface

com.trustonic.tuiservice

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A security layer by Trustonic.

Allows a “Trusted App” to interact directly with the user, completely isolated from the device OS.

It’s closed source and normal devs can’t use it for their apps.

Mainly used by OEM apps like Samsung Pay and for DRM.

Google implemented their own TUI in Android Pie: https://android-developers.googleblog.com/search/label/Trusted%20User%20Interface

https://www.trustonic.com/news/blog/benefits-trusted-user-interface/

Disabling will break “Trusted Apps”.

References

  1. https://stackoverflow.com/questions/16909576/how-to-make-use-of-arm-trust-zone-in-android-application
  2. https://en.wikipedia.org/wiki/Trusted_execution_environment
  3. https://en.wikipedia.org/wiki/ARM_architecture#Security_extensions
  4. https://googleprojectzero.blogspot.com/2017/07/trust-issues-exploiting-trustzone-tees.html
  5. https://medium.com/@nimronagy/arm-trustzone-on-android-975bfe7497d2
  6. https://www.synacktiv.com/posts/exploit/kinibi-tee-trusted-application-exploitation.html
  7. https://blog.quarkslab.com/introduction-to-trusted-execution-environment-arms-trustzone.html
  8. https://medium.com/taszksec/unbox-your-phone-part-i-331bbf44c30c
  9. nhttps://www.gsd.inesc-id.pt/~nsantos/papers/pinto_acsur19.pdf

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