Not sure if you want the book yet? Perhaps you'd like to read a few chapters first? Well, here ya go. By following the links below you can download pdf versions of four chapters from the book.
Introduction to Determining Identity (pdf): It’s not enough to have a secure connection between two machines. You also need to be sure that the person or computer you’re connected to is who it claims to be. This part discusses the pros and cons of the many available identification systems as well as ideal technology combinations.
Biometrics (pdf): Biometrics technologies measure a particular set of a person’s vital statistics in order to determine identity.
Firewalls (pdf): Firewalls are devices that can restrict information traveling in and out of a network.
File Integrity (pdf): File integrity tools can detect unauthorized modifications to critical system files and data.