Use the website the college has provided. This isn't about your convenience or technical judgement (about a system you don't maintain). It's about the students

Use the website the college has provided. This isn't about your convenience or technical judgement (about a system you don't maintain). It's about the students and the rest of the college. That said, encrypt the each grade with a key derived from the students ID (which is privileged information) and make a webpage to do the decryption for the students. SHA256 ( ID + Salt ) == Key for symmetric encryption. --former IT college staffer