Course

Introduction to Cryptanalysis

This course introduces you to the field of cryptanalysis.

    Syllabus

  • Course Introduction Video — 00:01:07
    • This video introduces the Introduction to Cryptanalysis course.

  • Introduction to Cryptanalysis Video — 00:07:56
    • This video lays the groundwork for performing cryptanalysis for cybersecurity.

  • Entropy Calculations Video — 00:03:02
    • This video describes entropy calculations and their use for analyzing ciphertexts.

  • Character Frequency Analysis Video — 00:05:26
    • This video describes character frequency analysis and its use for breaking substitution ciphers.

  • Encryption vs Encoding Video — 00:07:32
    • This video discusses the difference between encryption and encoding algorithms.

  • Breaking ROT Ciphers Video — 00:03:50
    • This video describes how to identify and break rotational ciphers.

  • Breaking Weak XOR Encryption Video — 00:04:03
    • This video describes how to identify and break improper use of XOR ciphers.

  • Breaking Misused Stream Ciphers Video — 00:03:37
    • This video describes how to break misused stream ciphers.

Syllabus

Course description

Cryptographic algorithms, if used correctly, can render data impervious to attack. However, it is common for them to be used incorrectly. This course describes some of the obfuscation methods commonly used instead of strong cryptography and how to identif

Meet the author

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 howard.poston@gmail.com or via his website at https://www.howardposton.com.

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