Complex sentence: One report suggested the College Board was considering requiring test-takers to submit a photograph of themselves on the test day as a precaution against impersonation; the photos would be kept in a password-protected database but which would not be shared with college admissions departments.
Split into simpler sentences: One report suggested the College Board was considering requiring that test-takers submit a photograph of themselves on the test day as a precaution against impersonation. The photos would be stored in a password-protected database, but would not be shared with college admissions departments.