In the recent, MIT OCW, January 2014, newsletter emailing (see - http://ocw.mit.edu/about/newsletter/ and http://ocw.mit.edu/subscribe/), with its listing of new and updated MIT OCW courses, MIT OCW shared an example of open courses with verification of identity, here, in edX - https://www.edx.org/course-list/mitx/id-verified/allcourses - and here - https://www.edx.org/verified-certificate - where the identity of the student is verified to assure that they've been doing the course work and the learning, and not someone else.
Courses with verified certificates will cost something like $100 per course through edX.
And here Yale Professor of Music and co-chair of Yale Online Education Committee - said that the cost of a Coursera course (at the 132 minute mark), with verification, would be between $40 and $75, with scholarships ...
See, too -
How much does Signature Track cost?
"The price of taking a Signature Track course depends on the course, and is displayed on your course’s Signature Track sign-up page. The cost is typically between $30-90 USD"
"Coursera will offer proctored exams at the end of these courses through ProctorU, an online proctoring service that connects proctors and students via webcam. The service will cost $60–$90."
World University and School will probably engage something like these verification systems for matriculated students, especially with our focus on students in the developing world, and plans to offer FREE (since C.C.), MIT-centric, WUaS (where students will take 32 courses for an undergraduate degree, for example), university degrees - with graduate student instructors potentially heading to become Professors (and who may do proctoring in the process, as well).