Hi Rick
Thanks for your reply. I really don't want to go into detail about how the exam is structured, but no, the password is not for the quiz, but is for an encrypted, password-protected data set file that the students will have been given beforehand. But I want the students to decrypt their unique data set file ONLY once they have opened the quiz. For this to happen, they each have to have a different password. And I want to use the timing of the quiz, so the easiest would be if each student was given that information at the start of the quiz. (The questions in the quiz are identical for each student, but the file on which they have work is unique).
So, as a student, you start the quiz when you can, and the timer starts. In the quiz, as part of your instructions or your question 1, you are given the unique password for your data set file, you decrypt it, and then answer the quiz questions based on your data file set. This ensures that students cannot share answers, because, although your question is the same as mine, your data set is different, so your answer will be different, and, if you share it with me, it will be wrong for my data set.
I don't want to include the data set in the quiz, because there are actually many files, and it will take time to
download, which is why I send the encrypted file to the student about a week before the exam.
I hope that clarifies things.
Regards
Ken