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    No, this is known as the DRM problem. Commented Apr 19, 2020 at 13:09
  • @user1937198 I am not sure I understand. I checkd some DRM related articles and i understand it is implemented to protect intelllectual property. How is the exemple I gave affected since the user does not have access to the protected content? Also do you mean DRM exists on android by default? Commented Apr 19, 2020 at 13:20
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    DRM covers any technique to restrict what a user can do with data on there systems. Commonly used to protect IP rights, the fundermental problems cover any form of restriction. Commented Apr 19, 2020 at 13:23
  • @user1937198 how would DRM affect the scenario I posted above? Does it make the QR code readable by the user even if the app tries to keep it off the UI? The encryption uses RSA for exemple. The UI of the app does not show the decrypted data but a tech_savy user can using other tools? Commented Apr 19, 2020 at 13:27