Problem
You work for a university and your colleague Mikhail sent you a spreadsheet with student information on it. It has the total number of credit hours they are taking, how many years they've been at the school, their email addresses, and their student ID number. In hidden columns it has their social security number and names; Mikhail says this is so no one reading the document can know which name goes with which information. Mikhail is planning on sharing the document with several people in and outside of your department and believes he has taken proper steps to secure students' private information and keep them anonymous. Do you agree? What mistakes has Mikhail made, or what could he do to be more conscientious about sensitive information?