Symmetric cryptography is one of the two major classifications of cryptographic algorithms. This course describes the main features of a symmetric algorithm and the two main subcategories of symmetric ciphers: block and stream. AES and RC4 are discussed as common examples of a block and a stream cipher.
Course IntroductionDuration: 1:36
This video introduces the Symmetric Cryptography course.
Fundamentals of Symmetric CryptographyDuration: 5:02
This video describes symmetric ciphers and the main classifications of symmetric ciphers.
Block CiphersDuration: 15:13
This video introduces block ciphers and block cipher modes of operations.
The Advanced Encryption Standard (AES)Duration: 12:26
This video provides an introduction to the AES and its security.
Stream CiphersDuration: 6:10
This video introduces stream ciphers, the one-time pad and bit-flipping attacks.
Rivest Cipher 4 (RC4)Duration: 5:10
This video introduces RC4 and its security.
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 email@example.com or via his website at https://www.howardposton.com.
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