AFAIK, encryption routines were classed as Auxiliary Military Technology, and later changed to another status by Bubba Clinton via executive order.- The change in status made it easier for software developers to import and export their products, before that any strong encryption couldn't be moved to and from the USA without breaking the same laws that prevent weapon trafficking.
With that being said, The Government can and still does demand access to engines when a strong encryption scheme is developed as part of licencing requirements.
Regardless, the bottom line remains the same. If The USA cant decipher it, its not legal to use within the borders of the United States.
So, the short answer is 'no' - Too bad, primitives.