In Episode 17 (Season 5): “The Social Contract” of House M.D. there is a throwaway line about how Wilson never password protects his patient files.
The context is that House has sent Taub to discover what Wilson is up to behind his back instead of going to the Monster Truck Rally with him. Taub brings back a bunch of print outs of deleted emails including one exchange between Wilson and a fellow oncologist from another hospital which included a patient file that couldn’t be printed out because it was password protected.
I’d be very worried if doctors were not routinely encrypting files let alone merely password protecting them if they are sending them via email.