Pro PHP Security: From Application Security Principles to the Implementation of XSS Defenses, Second Edition

US Government Restrictions on Exporting Encryption Algorithms

Encryption makes law enforcement agencies and officials nervous, because it protects secret communication between lawbreakers just as well as it protects legitimate messages between law-abiding citizens and organizations. The United States government has been concerned, from the time that encryption algorithms first became widely accessible over the Internet, about the national security implications of having such powerful resources available worldwide. It has therefore imposed severe restrictions on citizens' ability to export such information, ignoring arguments that transmission over the Internet is something quite different from exportation.

As we mentioned earlier, perhaps its ...