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+**Functional Requirements**
+_Feature - authentication app user experience_
+### USF1 
+As a user, I want the authentication app to notify me if my Estonian ID card is not near the smartphone NFC chip when trying to authenticate, so that I know when I am holding it in the wrong place.
+### USF2
+As a user, I want the authentication app to require me to enter a valid PIN code to authenticate or give a signature, so that people who don’t know the PIN codes can’t steal my identity.
+### USF3
+As a user, I want the authentication app to give me the option to use biometric authentication instead of entering PIN 1, because it’s more convenient and faster.
+### USF4
+As a user, I want the authentication app to automatically close after the authentication process, so that I won't have to close the app myself.
+
+_Feature - interacting with a website_
+###USF5
+As a user, I want to use the authentication app for authenticating myself on a website in a mobile browser with an Estonian ID card, so that I can log into the test website with my smartphone.
+###USF6
+As a user, I want to use the authentication app to give a signature while on a website in a mobile browser with an Estonian ID card, so that I can verify that the functionality works on the test website.
+Feature - interacting with other mobile apps
+###USF7
+As a user, I want to use the authentication app for authenticating myself in a mobile app with an Estonian ID card, so that I can authenticate in the test mobile app with my smartphone.
+###USF8
+As a user, I want to use the authentication app to give a signature in a mobile app with an Estonian ID card, so that I can verify that the functionality works on the test app.
+Feature - for developers
+###USF9
+As a developer, I want the mobile app to return an error code when problems occur, so that I can handle various situations in my own app or on my website.
+###USF10
+As a developer, I want the mobile app project to interact with the test website and the test app, so that I can check whether the authentication system works as promised.
+
+**Non-functional Requirements**
+
+###USN1
+As a client, I want the mobile app to be developed for Android phones, because I have more experience with Android development.
+###USN2
+As a client, I want the mobile app to have a minimal Android API level 26, because supporting older Android versions is not important for this project.
+###USN3
+As a client, I want the mobile app to be web-eID compatible, because the application is going to be used with Estonian ID cards.
+###USN4
+As a client, I want the mobile app to use NFC technology, so that I can authenticate myself with my NFC-enabled Estonian ID-card on my NFC-enabled Android phone.
+###USN5
+As a developer, I want the app to have detailed documentation so that I can use it to implement these features in my own applications.
+###USN6
+As a developer, I want the source code of the mobile application to have comments, so that I can understand the code.
+###USN7
+As a user, I want the mobile application to not store data about my ID card after the authentication process, unless asked, so that I don’t have to worry about my data safety.
+###USN8
+As a vision impaired user, I want to authenticate myself without being able to see the screen, so that I can also use the app.
+###USN9
+As a user, I want the authentication app to open within 10 seconds 99% of the time, so that my experience is comfortable.
+###USN10
+As a user, I want the time between inserting the PIN and the recipient receiving the JWT token to be less than 15 seconds 99% of the time, so that I don’t have to wait long.
+###USN11
+As a user, I want the application to support Estonian and English languages, so I can use it in the language I’m more comfortable with.