Originally Posted by CDTraveler

And can you provide a link to support your statement?

In a Google search I was able to find many sources stating that CBP (not TSA) does not require probable cause, but not a single story to the contrary came up in the first three pages. There were also a number of stories of devices being confiscated by the CBP for search by their staff, whom I suspect have technology which could bypass many, if not most, password systems.