I'm sorry, I was wrong. It requires a license from the State Encryption Management Commission: http://www.cryptolaw.org/cls2.htm#prc http://www.cryptolaw.org/cl

I'm sorry, I was wrong. It requires a license from the State Encryption Management Commission: http://www.cryptolaw.org/cls2.htm#prc http://www.cryptolaw.org/cls2.htm#prc I am not a lawyer nor a cryptography expert who can advise whether licenses are granted easily or whether they are revoked if you fall out of favour.