References On Security Technology

http://www.schneier.com/
Bruce Schneier is an internationally renowned security technologist and author. Described by The Economist as a "security guru," he is best known as a refreshingly candid and lucid security critic and commentator. When people want to know how security really works, they turn to Schneier.

http://www.seguranca-informatica.net/
A Portuguese blog by university professors on IT security with references to interesting articles and several links and feeds of other related sites, such as Schneier's blog.