Amit Singh has written an article touching on many key aspects of what is needed to get a good understanding of the world of computer security. It's not a forensics manual or an exhaustive book on the subject, but it does a very good job of hitting all the bases and educating at a level deeper than you'll get from the new sources that write quick one-off stories, and in this day and age, that's a worthwhile thing.

His paper, which is entitled "A Taste of Computer Security," is divided into these chapters:

Popular Notions About Security \
Defining Computer Security
Traditional Unix Security
Security Uprooting Vehicles
The Net Growth In Insecurity
Digital Life: Viruses
Digital Life: Worms
Viruses on Unix
Platform-Independent Malware
Defeating Memory
Securing Memory
Access Control
Detecting Intrusion
Sandboxing
An Example: Solaris Security
Miscellaneous
Unix vs. Windows

  • Epilogue

I found it worth the read, and recommend it to people who may not be security professionals full-time, but need a certain level of understanding to really know what they need to know in their daily jobs.