I think some people like the Hof are living in some fantasy world.All this encryption rubbish is only to stop an honest thief not a law enforcement agency.
If the Hof thinks that customs or any gov group does not have computer experts he is deluding himself.It may take some time but they'll get there and then charge him with refusing to assist customs or hindering their investigation.
There is a copious amount of detailed research and data into encryption technologies as applied by some of the brightest computer science minds on the planet all freely available on the internet. I suggest you go read some of it. Of course they have computer experts on their staff, but tools to crack even a moderate level of consumer grade equipment just do not exist in a way that would be usable to law enforcement or customs during a routine or even in depth investigation.