He likes encryption
http://www.wired.com/threatlevel/2012/10/megaupload-mega/Dotcom, and his Mega partner Mathias Ortmann say the difference is that now those files will first be one-click-encrypted right in a client’s browser, using the so-called Advanced Encryption Standard algorithm. The user is then provided with a second unique key for that file’s decryption.
Dotcom says that according to his legal experts, the only way to stop such a service from existing is to make encryption itself illegal. “And according to the U.N. Charter for Human Rights, privacy is a basic human right,” Dotcom explains. “You have the right to protect your private information and communication against spying.”