[lda]

As a non-citizen, I would not risk being labelled uncooperative by the border agents. Just because they cannot compell you to surrender your passphrase doesn't mean they couldn't hold it against you in the future (longer visa processing times, extra background checks).

As suggested in the pdf, a wiser approach is cross the border with an immaculate system and download your data afterwards.

[MaysonL]

Heck, non-citizens labelled uncooperative are liable to be refused entry, and blacklisted.