Compare and contrast the different levels of effort required to gain access to a safe VS a persons iPhone prior to this data update.

Authourities must first gain access to premises with a warrant and then get a safe cracker in.

VS: authourities (at an airport or just about anywhere) take the phone off the person, there is a layer of obsfucation as to whether a warrant has been obtained or is needed, and data is collected.

If you look at the history of digital data (ie echelon etc) there is a clear trend for vast data hovering of all and any resources. This is not possible with physical data, as it leaves behind a more concrete trail when authorities go after it, and causes them to (generally) be more selective about what they are doing