623
U.S. officials urge Americans to use encrypted apps amid unprecedented cyberattack
(www.nbcnews.com)
This is a most excellent place for technology news and articles.
You can try, and in the US, we have export restrictions on cryptography (ITAR restrictions), so certain products cannot be exported. But you can print out the algorithm and carry it on a plane though, so I'm not sure what the point is...