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Virtual Private Networks (VPNs)

This course describes the use of cryptography in Virtual Private Networks (VPNs).

3 videos  //  19 minutes of training

Course description

Virtual Private Networks (VPNs) are a common security tool used to provide an end-to-end encrypted connection between a client and an endpoint server. This course discusses the pros and cons of the major VPN protocols and some of the limitations of the protections provided to the user by VPN software.

Course syllabus

Course IntroductionDuration: 1:13

This video introduces the VPNs course.

Introduction to VPNsDuration: 11:01

This video describes the most commonly used VPN protocols.

VPN LimitationsDuration: 6:43

This video describes some of the limitations of VPNs.

Meet the author

Howard Poston


Howard Poston is a cybersecurity researcher with a background in blockchain, cryptography and malware analysis. He has a master's degree in Cyber Operations from the Air Force Institute of Technology and two years of experience in cybersecurity research and development at Sandia National Labs.

He currently works as a freelance consultant providing training and content creation for cyber and blockchain security. He can be reached by email at or via his website at

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FireEye, Inc.

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Plans and pricing





$599 / license

Annually. Includes all content plus team admin and reporting.