Check out this fascinating report in Wired last week, which explains how Cornell Tech researchers cracked the code to shortened URLs from Microsoft and Google and as a result were about to figure out personal information about specific individuals: "By guessing at shortened URLs until they found working ones, the researchers say that they could have pulled off tricks ranging from spreading malware on unwitting victims’ computers via Microsoft’s cloud storage service to finding out who requested Google Maps directions to abortion providers or drug addiction treatment facilities."
