wrong grading in ex-10

Question

In question 1c, the required answer was 'IJ.' I submitted 'ij,' which is essentially the same, but it was marked wrong because of case. This is confusing, especially since the example provided ('qrs') shows a lowercase format

Answer 1

Im Not 100 % sure (I’m also a student) but base64 encodings are case sensitive. But the values for ij would be 34 and 35. the correct solution is 8 and9 so IJ. Because of this reason I think it makes a difference between IJ and ij because the third position could only be 8 or 9 so result in an IJ and not 34/35. the table in the link should explain what I mean. https://datatracker.ietf.org/doc/html/rfc4648#page-8

Comments

that would have been my answer as well, thanks for replying :)