From ACLU:
Aiming to determine the impact of border searches on Americans’ civil liberties, the Department of Homeland Security has produced a report on its policy of combing through and sometimes confiscating travelers’ laptops, cell phones, and other electronic devices—even when there is no suspicion of wrongdoing. The report was completed sometime between October 2011 and September 2012, and last week DHS quietly posted only the executive summary on its website, without many people noticing.
The report draws the highly questionable conclusion that the border search policy does not violate our Fourth Amendment right to privacy, chill our First Amendment rights to freedom of speech and association, or even result in discriminatory search practices.