Basics of Cryptology – Part 5 (Modern Cryptography – Stream Ciphers – RC4)

#cryptology, #cryptography, #cryptanalysis, #lecture, #course, #tutorial In this video, we show the basics of cryptology (cryptology = cryptography and cryptanalysis). This particular video shows in detail how the modern stream cipher RC4 works. First, we discuss in detail the internal workings of RC4 and give a brief overview of its invention. Then, we show a visualization of RC4 in JCrypTool (10:04). Finally, we use CT2 (from 13:04) to encrypt and decrypt text using RC4. Here, we also show what happens, if you change a byte in the plaintext, ciphertext, or in the key. 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 You may download the latest version of JCrypTool here: https://www.cryptool.org/en/jct-downloads Finally, you may download the latest version of CrypTool 2 here: https://www.cryptool.org/en/ct2/downloads Like what I do 😄? Help fuel my crypto obsession 🎓 — buy me a coffee here☕— thx: https://buymeacoffee.com/cryptographyforeverybody