Operational Security
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This course is the first installment of three courses covering Domain 2 of the CSSLP, covering the topic of policy decomposition.

Learning Objectives

  • Understand the fundamental concepts of information security and operational security
  • Learn about the CIA Triad
  • Learn about Triple A services and how they help keep software available and safe
  • Understand the internal and external requirements for building secure software

Intended Audience

This course is designed for those looking to take the Certified Secure Software Lifecycle Professional (CSSLP)​ certification, or for anyone interested in the topics it covers.


Any experience relating to information security would be advantageous, but not essential. All topics discussed are thoroughly explained and presented in a way allowing the information to be absorbed by everyone, regardless of experience within the security field.


If you have thoughts or suggestions for this course, please contact Cloud Academy at


So, when thinking about operational security, what are the things that we need most? Well, we need performance, we need reliability, we need availability. And we need to be sure that the program will not only do everything we want it do in the way of functionality, but that it doesn't do things we don't want it to do or have security problems that threaten the software and the data that it processes.

Now overall, we need to have a process that covers these three elements. Prevention, which includes things like access control, firewalls and encryption . Detection, which includes ways and means for us to know what is going on whether it's appropriate or not. And that would include things like audit logs, IDS IPS types of systems and deception technology. Followed by reaction, and this would include all the different ways and methods that we would use to respond to anything we find that is untoured, unknown or outright hostile. This would include our incident response team, the performance of forensics, the processes of restoration, and then finally the resumption of our business.

Now, we always need to remind ourselves that what we're looking for is not perfect security. We're looking for it to be commensurate protection. That is, it needs to be quite literally good enough to be able to protect the system and its data to a level that is appropriate to the value of the assets it is processing.

About the Author
Learning Paths

Mr. Leo has been in Information System for 38 years, and an Information Security professional for over 36 years.  He has worked internationally as a Systems Analyst/Engineer, and as a Security and Privacy Consultant.  His past employers include IBM, St. Luke’s Episcopal Hospital, Computer Sciences Corporation, and Rockwell International.  A NASA contractor for 22 years, from 1998 to 2002 he was Director of Security Engineering and Chief Security Architect for Mission Control at the Johnson Space Center.  From 2002 to 2006 Mr. Leo was the Director of Information Systems, and Chief Information Security Officer for the Managed Care Division of the University of Texas Medical Branch in Galveston, Texas.


Upon attaining his CISSP license in 1997, Mr. Leo joined ISC2 (a professional role) as Chairman of the Curriculum Development Committee, and served in this role until 2004.   During this time, he formulated and directed the effort that produced what became and remains the standard curriculum used to train CISSP candidates worldwide.  He has maintained his professional standards as a professional educator and has since trained and certified nearly 8500 CISSP candidates since 1998, and nearly 2500 in HIPAA compliance certification since 2004.  Mr. leo is an ISC2 Certified Instructor.