[Not A Snowbird]

It might be detectable, then again the kid might have the password for the computer you use to download the information and hence could 'own' the spy chip that way.

Too true. My daughter has her own computer and is not allowed on mine, and I guard my logon password very carefully.

[Dinsdale]

is not allowed on mine

I'd have had a hardware keylogger on your machine so fast it would make your head spin...perhaps so has your daughter.

If she did it right you would never know.

Technical solutions give false security all too often.