Cryptography Export Restrictions
Any software that uses cryptography may be covered by any of several United States laws regarding the exporting of cryptographic software. According to the U.S. government, if you allow electronic downloads of software, you're "exporting" it, even if you never ship software out of the country. For more information, see http://www.bis.doc.gov/Encryption/Default.htm, http://www.bis.doc.gov/Encryption/CheckListInstr.htm, and http://www.bis.doc.gov/Encryption/ EncFactSheet6_17_02.html.
D.B.S. and E.B.T