Claim your FREE 7-day trial

Fundamentals of Cryptography

This course describes mathematics and structures commonly used in cryptography.

3 videos  //  21 minutes of training

Course description

Encryption algorithms all do the same job but can do it in very different ways. However, some features can be found across multiple families of cryptosystems. This course discusses some of the mathematical operations and structural design elements that can be found in many different cryptographic algorithms.

Course syllabus

Course IntroductionDuration: 1:11

This video introduces the Fundamentals of Cryptography course.

Mathematics of CrpytographyDuration: 7:40

This video describes some of the mathematical operations most used in cryptography.

Structures of CryptographyDuration: 12:01

This video describes Feistel networks and the use of separated encryption algorithms and key expansion protocols in ciphers.

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.