To keep protocol’s and devices data safe you can use a password to keep your data safe in a document that only you know the password so only you can get into it you should use a password that no-one would think of for example an old nickname and not something like your birthday or family member .Do not leave your documents logged in so no-one can get into your account without any problems. Bluetooth is very easy to hack as the code is easy to read but when the internet connection is protected by W.P.A making it harder to hack unless you leave your internet open then it is only a few easy steps away to hack into. Encryption scrambles your own personal information so its easier to not hack into your devices and if they did then your information is scrambled so they will not be able to understand and to steal your personal information.