The export of AES-encoding methods from a server, which is located in the US, is forbidden by the U.S. Export Administration Regulations governed by the U.S. Dept. of Commerce, Bureau of Industry and Security - if the methods are provided as code. But the export as written document is allowed, as far as I understand, because it is covered by the freedom of speech, see:
Fortunately Java has a built-in AES encryption method for 128 bit keys. You need 3 lines of code only to use it, but posting these lines on a TMW server is not allowed also.
