Is there a list of cryptographic algorithms I cannot export / share / write for clients outside of the U.S? My guess is they are things hidden from us but I could be wrong.
Anything with 64b+ encryption must be reported [1].
Strong encryption is still subject of export restrictions. For example, Java need special unlock to enable encryption 128bits+
[1] https://www.federalregister.gov/articles/2010/06/25/2010-150...