Puzzle of the Day

An educational company is developing a class that willuse Ñdistance learning.æ The idea is that students 
can reside at any node on the Internet. They will download class materials, work on their own, and submit 
the results by electronic mail (or some other prearranged method). During specific times, TAs and the 
instructor will be on line and available via an interactive conferenceing system called Remote Tutor. But 
thereºs one problem: giving tests. The company plans to give interactive tests, with questions being posed 
and the student answering in real time. The student will be at the remote node, of course.

1.	From the companyºs point of view, what is the security problem in this scheme, assuming the connec-
tions can be secured and the testing computer (the one giving the test, not the one the student is at)?

2.	What would you suggest to the company? Think about how you would prevent the spoofing.