You could. You're carrying encrypted data across borders. That shouldn't be anything that raises flags, and we need to campaign to make it normal. (After all, US businesses need to protect the US by stopping US technology and trade secrets and etc from getting into the hands of foreign spies).

But sadly we live in a world where carrying encrypted data is a flag, and will get you more scrutiny, and get your name put on lists.

It also doesn't help if you carry the passphrase on you with your encrypted data.