Guest Editorial - Special Collection: Security

This Special Collection consists of extended and/or reworked versions of selected papers presented at the Australasian Information Security Workshop (Privacy Enhancing Technologies) 2007, and at the Australasian Information Security Conference 2008. These two conferences received a total of 50 submissions, 21 of which were accepted and presented. We invited the authors of the top 50% conference papers to extend their work and submit it for publication in the JRPIT Special Collection on Privacy and Cryptography. We conducted another refereeing process, and out of the ten submissions received we accepted four high quality papers for the Special Collection on Privacy and four for this Special Collection on Security.