Let me elaborate a bit more on the use case. Maybe I’m approaching this from the wrong standpoint.
I am a high school student, and I (along with my friends) am developing an app for use in our school. The app will handle sensitive information from teachers about student grades. We (the students) are hosting the app because the school is not able to.
However, it is crucial we can not find out about other students grades (as this violates several rules/laws). Our plan is to encrypt the data with the teacher’s private key, and store it in a way that we (the students) can not access.
Is there any other way we’re overlooking?