Cryptography Course

This course discusses how the poor use of cryptography can leave an application vulnerable to attack and how it can be exploited, as well as potential mitigations.

40 minutes

Course description

Cryptography is a very useful tool. However, it can also be very fragile. A small error in design or implementation can destroy any benefits of using encryption in an application. This course describes some of the common errors that developers make when using cryptography and how to remediate them.


Poor Cryptography Demo

Video - 00:05:00

This video demonstrates exploitation of a cryptography error.
Cryptography Error Mitigations

Video - 00:05:00

This video describes mitigations for common cryptography errors.
Cryptography Errors Case Study

Video - 00:04:00

This video describes a case study of an application that misused cryptography.
Cryptography Error Exploitation

Video - 00:09:00

This video describes how cryptography errors can be exploited by an attacker.
Cryptography Errors

Video - 00:09:00

This video describes how cryptography errors can make an application vulnerable to attack.
Introduction to Cryptosystems

Video - 00:06:00

This video covers the fundamentals of cryptosystems.
Introduction to Cryptography

Video - 00:02:00

This video provides an introduction to the cryptography course.

Meet the author

Howard Poston

Howard Poston is a copywriter, author, and course developer with experience in cybersecurity and blockchain security, cryptography, and malware analysis. He has an MS in Cyber Operations, a decade of experience in cybersecurity, and over five years of experience as a freelance consultant providing training and content creation for cyber and blockchain security. He is also the creator of over a dozen cybersecurity courses, has authored two books, and has spoken at numerous cybersecurity conferences. He can be reached by email at or via his website at

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