Basics of Cryptology – Part 4 (Modern Cryptanalysis – Shannon's Entropy and Brute-Force Attack)
#cryptology, #cryptography, #cryptanalysis, #lecture, #course, #tutorial In this video, we show the basics of cryptology (cryptology = cryptography and cryptanalysis). This particular video introduces the Shannon's information entropy, which we use for a brute-force attack on a (keyspace-reduced) DES cipher. First, we give a short historical overview on the term "entropy". Then, we discuss the Shannon's information entropy, which is a measure for the value of information of data. Finally, we use the Cost Function component in CrypTool 2 to have a look at entropy values of plaintext and ciphertext and we also use the CrypTool 2 KeySarcher component to break a DES cipher-encrypted ciphertext (with a search space of 24 bit). To see all videos in the "Basics of Cryptology" series, use this playlist: • Learn the Basics of Cryptology – Also for ... If you are further interested in details on classic ciphers, you may have a look at the classic ciphers playlist: • Break the Double Columnar Transposition Ch... If you are interested in details about CrypTool 2, you may have a look at this video here, which gives a short introduction: • Short Introduction to CrypTool 2 Finally, you may download the latest version of CrypTool 2 here: https://www.cryptool.org/en/ct2/downl... Like what I do 😄? Help fuel my crypto obsession 🎓 — buy me a coffee here☕— thx: https://buymeacoffee.com/cryptography...
Basics of Cryptology – Part 5 (Modern Cryptography – Stream Ciphers – RC4)
The Story of Information Theory: from Morse to Shannon to ENTROPY
Basics of Cryptology – Part 2 (Cryptanalysis – Terminology & Classical Ciphers)
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Basics of Cryptology – Part 1 (Cryptography – Terminology & Classical Ciphers)
Basics of Cryptology – Part 3 (Modern Symmetric Ciphers – Stream Ciphers & Block Ciphers)
Basics of Cryptology – Part 6 (Modern Cryptography – Block Ciphers – SPN Ciphers)
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