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About the Author:

Jack is a Senior Instructor and Security Program Manager at InfoSec Institute, a provider of advanced ethical hacking training. He regularly is called upon to train members of the United States intelligence community, military, and federal law enforcement agencies. Additionally, Jack provides training for Fortune 500 companies, such as Microsoft, HP and Citibank on how to better secure their networks and applications. When not teaching hacking classes, Jack regularly performs penetration tests and application security assessments for a number of clients. He has years of private vulnerability development and exploitation experience for his customers and himself. Jack is the lead author of "The Shellcoder's Handbook: Discovering and Exploiting Security Holes". He is also the author of "Intrusion Detection with Snort", one of the best selling security books in its first year of publication, 2003. The book has been translated into several languages, including French and Japanese , and has received rave reviews from Linux Journal , Slashdot and Information Security Magazine. Jack has appeared in USA Today, CNN, MSNBC, First Business and other media outlets for his expert opinions on information security.

CISSP Question of the Day: Symmetric Encryption and Integrity

A new feature here, lets discuss a popular CISSP topic and review a single potential question you may see on the CISSP exam.

Symmetric key cryptography is an important concept […]


Thousands of free practice test questions for CISSP, CEH and PMP

If you haven’t seen the Skillset exam prep engine, it is worth checking out. It is a better way to assess your knowledge and improve your readiness to sit […]


Free CISSP Training and Study Guide


If you are looking to prepare for the CISSP, one of the domains that gives many students trouble is Cryptography. Quite often IT professionals have experience with crypto, but […]


Free Mini Course – CompTIA Security+ Performance Based Exam Questions

InfoSec Institute latest free Mini Course is now available, a free Security+ training module covering the most difficult portion of the Security+ Exam, Performance Based Questions.

The course includes a […]


How to Prepare For Performance-Based Security+ Exam Questions

How to Prepare For Performance-Based Security+ Exam Questions

As you prepare for the CompTIA Security+ Exam, the more you understand the different question types, the more you prepare yourself for […]


InfoSec Institute Awarded Top 20 Training Company – And We Are Hiring!

InfoSec Institute was recently awarded the Top 20 IT Training Company in 2013 distinction, for the 3rd year in a row. A much appreciated thank you goes out to every […]

New Position: Product Development Lead

We have an excellent opportunity for a motivated candidate. You will be the produce owner of SkillSet.com, the newest addition to our well-established company’s product offerings. While new, this […]

InfoSec Institute is Hiring: Security Researcher

Passionate about security? Want your day job to pay you for doing security research?

Interested in researching the latest threats and countermeasures and turning it into a courseware product that […]

We’re Hiring: Information Technology Instructor for Online Programs

Passionate about security & learning?
We are hiring an Information Technology Instructor for our online courses 


Under general supervision, plans and implements curriculum and educational programs for students within the […]

InfoSec Institute Security+ Review – From A Student’s Perspective

See what it is like to attend the InfoSec Institute CompTIA Security+ Training course:

Jack Koziol

InfoSec Institute CISSP Boot Camp Instructor Interview


Check out our latest instructor interview, learn our approach to CISSP exam success from Kelly Handerhan:

Jack Koziol


InfoSec Institute Review – Ethical Hacking

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InfoSec Institute Ethical Hacking students share their experiences in a recent Dulles, VA boot camp-style training course.

Please let us know what you think! The course page is located here […]

InfoSec Institute is hiring: Content Acquisition Manager

InfoSec Institute is seeking an energetic and innovative Content Acquisition Manager for our Intense School brand to develop and maintain an industry-leading online publication. You will shape the success […]


Interview: Wolf Halton

Wolf Halton is a popular Speaker on topics of Internet Security, Linux and Open-Source Adoption, and Project Management Strategies. He’s the founder of SourceFreedom.com. He currently is a Senior (Linux Network) […]

MobiKEY Fusion_1

Interview: Tony Busseri, CEO of Route1

Tony Busseri is the CEO of Route1. He leads the management team in executing Route1’s strategic vision. Mr. Busseri is an entrepreneurial executive with a track record of producing […]


Interview: Charles Weaver, CEO of MSPAlliance

Charles Weaver is the co-founder and CEO of the MSPAlliance. In addition to running the daily operational operations of the association, he writes and speaks extensively around the world […]




CISSP or Associate

Imperva’s Amichai Shulman Discusses the Boy in the Browser Attack

There was a lot of attention paid to a new type of browser attack recently called the Boy in the Browser. To find out more about this […]

HD Moore Reveals His Process for Security Research


In our ongoing series of interviews, we got HD Moore to answer a few questions and pull back the curtain a bit on the methods, tools and motivation for […]

Charlie Miller Reveals His Process for Security Research

As the first in an ongoing series of interviews, we got recent Pwn2Own winner Charlie Miller to answer a few questions and pull back the curtain a bit on […]