Ron Ben-Natan 
HOWTO Secure and Audit Oracle 10g and 11g [PDF ebook] 

This guide demonstrates how to secure sensitive data and comply with internal and external audit regulations using Oracle 10g and 11g. It provides the hands-on guidance required to understand the complex options provided by Oracle and the know-how to choose the best option for a particular case. The book presents specific sequences of actions that should be taken to enable, configure, or administer security-related features. It includes best practices in securing Oracle and on Oracle security options and products. By providing specific instructions and examples this book bridges the gap between the individuals who install and configure a security feature and those who secure and audit it.