[adrianba]

The law here is not completely developed. The US Supreme Court has not ruled on the extent to which electronic devices of a US person may be searched at a border.

In practice, courts have generally allowed manual, cursory searches of electronic devices (such as looking at recent photos) as being similar to a search of luggage. However, courts have disagreed on how intrusive the search can be and whether a more invasive search at the border can be conducted without some additional suspicion.