Security and Cryptography (S2, 2014)

Block Ciphers and DES

Lecture Material

Lecture Notes: View, Print
Ideal 2-bit Block Cipher Example
Simplified DES Example
Simplified AES Example
Block Cipher Meet-in-the-Middle Attack Example
5 bit Block Cipher for another example of Meet-in-the-Middle Attack
Example Uses of Ciphers: View, Print
Brute Force of DES and AES: View, Print

Readings

Cryptography and Network Security by Stallings: chapter 3
Computer Security by Stallings and Brown: chapter 20, 2
Cryptography and Network Security by Forouzan: chapter 5/6
Network Security by Kaufman, Perlman and Speciner: chapter 3
Security Engineering by Anderson: chapter 5
Handbook of Applied Cryptography by Menezes, van Oorschot and Vanstone: chapter 7

Videos

This year: Part 1, Part 2, Part 3
Last year: Part 1, Part 2, Part 3
Demo: DES Encryption using OpenSSL, including examples of openssl, /dev/urandom and xxd in Linux.

Notes

Hover over images to see the title; right-click and view the image to zoom in. Alternatively, download a zip archive with all the images or a printable PDF of the notes.

Simplified DES Example Expect half of bits to be different between two ciphertext Chosen Plaintext Attack on DES Meet-in-the-Middle Attack on Double Cipher Double Cipher Encrypt showing same X

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