Paul Wouters has been involved with Linux networking and security since he co-founded the Dutch ISP 'Xtended Internet' back in 1996, where he started working with FreeS/WAN IPsec in 1999 and with DNSSEC for the .nl domain in 2001.
He has been writing since 1997, when his first article about network security was published in Linux Journal in 1997. He still writes on occastion for the Dutch "c't Magazine", focussing on Linux, networking and the impact of the digital world on society. He has presented papers at Sans, SecTor, BlackHat, DefCon, CCC, and several other conferences.
He co-founded Xelerance in 2003, focusing on IPsec, DNSSEC, and virtualization, where he is responible for the development of enterprise appliances simplifying the management of these complex security technologies. He is also the release manager for the Linux Openswan IPsec suite.
Stefano Maccaglia is an Italian, Ethical Hacker and Network professional. In 1997, he started his career as a technician in Compaq (Italy). He has worked in Australia, New Zealand, and US and for the past 10 years he has been involved in many projects. Currently, he is a Consultant and Trainer in Poste Italiane, however, he continuously supports the BlackSun Factory Tiger team. Stefano is preparing a book on Network Admission Control framework, which is based on the experience he has gained in the last two years. He participates actively on the security research field.