2009 - Book about how to setup security monitoring for your network
2007 - ShortCut published by O'Reilly
2005 - Advice on how to encrypt sensitive data in databases
2003 - Survey of techniques available for securing web services, with examples and advice
2002 - A guide to hardening the Apache web server, enabling a secure deployment for DMZ's or hostile environments
2002 - A guide to hardening the Apache 1.3 web server