Claim your FREE 7-day trial

Public Key Infrastructure (PKI)

This course describes the use of cryptography in the PKI infrastructure.

3 videos  //  19 minutes of training

Course description

Public Key Infrastructure is what makes digital signatures and asymmetric cryptography usable in the real world. This course describes how PKI works, the roles and responsibilities of the parties involved, and some of the fundamental assumptions of PKI and their impacts on the security of the system.

Course syllabus

Course IntroductionDuration: 1:30

This video introduces the PKI course.

Introduction to PKIDuration: 13:10

This video describes how the PKI infrastructure works and the parties involved.

Security of the PKI EcosystemDuration: 4:13

This video describes some of the security assumptions of the PKI ecosystem.

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

You're in good company

"Comparing Infosec to other vendors is like comparing apples to oranges. My instructor was hands-down the best I’ve had." 

James Coyle

FireEye, Inc.

"I knew Infosec could tell me what to expect on the exam and what topics to focus on most."

Julian Tang

Chief Information Officer

"I’ve taken five boot camps with Infosec and all my instructors have been great."

Jeffrey Coa

Information Security Systems Officer

Plans and pricing





$599 / license

Annually. Includes all content plus team admin and reporting.