Basics of Cryptology – Part 12 (Modern Asymmetric Cryptography – Diffie-Hellman Key Exchange)

#cryptology, #cryptography, #cryptanalysis, #lecture, #course, #tutorial

In this video, we show the basics of cryptology (cryptology = cryptography and cryptanalysis).

This video here gives an introduction to a very special part of modern asymmetric cryptography: We discuss the Diffie-Hellman-(Merkle) key exchange. First, we give an introdiction to the key exchange paradox. After that, we give a brief introduction in the history of the Diffie-Hellman key exchange. Then, we explain the basic idea with colors. After that, we give an introduction into the needed mathematics and we explain the Diffie-Hellman key exchange in detail. Finally, we show different templates in CrypTool 2 that interactively present the Diffie-Hellman key exchange.

Hint: This video here uses as finite group the cyclic multiplicative group built by the powers of a primitiv root r modulo n. This is an easy to understand example of a group which can be used for
DH key exchange. We also want to add, that finite groups can also be built with the points on elliptic curves. This is visualized in JavaCrypTool (https://www.cryptool.org/en/jct-downloads).

To see all videos in the "Basics of Cryptology" series, use this playlist: https://www.youtube.com/playlist?list=PLMuvAbyIl0PT6zaRVpK0FCSNMgwAOckTt

If you are interested in details about CrypTool 2, you may have a look at this video here, which gives a short introduction: https://www.youtube.com/watch?v=dELT2-Vgsr8

Finally, you may download the latest version of CrypTool 2 here: https://www.cryptool.org/en/ct2/downloads

Видео Basics of Cryptology – Part 12 (Modern Asymmetric Cryptography – Diffie-Hellman Key Exchange) канала Cryptography for Everybody