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Hash Functions

This course provides an introduction to hash functions.

4 videos  //  17 minutes of training

Course description

Hash functions are cryptographic algorithms designed to provide integrity protections rather than confidentiality. This course walks through how collision resistance works (and its importance to hash functions) and describes the SHA hash family, which includes some of the most commonly used hash functions.

Course syllabus

Course IntroductionDuration: 1:10

This video introduces the Hash Functions course.

Introduction to Hash FunctionsDuration: 3:24

This video introduces hash functions and the importance of hash function collision resistance.

Collision ResistanceDuration: 8:28

This video describes the necessary properties for hash function collision resistance.

The SHA Hash FamilyDuration: 4:26

This video introduces the SHA family of hash functions.

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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Plans and pricing





$599 / license

Annually. Includes all content plus team admin and reporting.