PPT-Cryptography: Block Ciphers

David Brumely Carnegie Mellon University Credits Slides originally designed by David Brumley Many other slides are from Dan Bonehs June 2012 Coursera crypto class What is a block cipher. Princeton University . Spring 2010. Boaz Barak. Lecture 7: . Chosen Plaintext Attack. Block . Ciphers. Short Review of PRF construction. 2. G. f. s. (x). Snapshot after . i. invocations.. Short Review of PRF construction. Demijan. . Klinc. * . Carmit. . Hazay. † . Ashish. . Jagmohan. **. Hugo . Krawczyk. ** . Tal Rabin. **. * . Georgia . Institute of . Technology. ** . IBM T.J. Watson Research . Labs. † . Chapter 3. Fifth Edition. by William Stallings . Lecture slides by . Lawrie. Brown. Content. Block Cipher Principles. The Data Encryption Standard. Simplified-DES. DES Details. DES Design Issues and Attacks. Rice ELEC 528/ COMP 538 . Farinaz Koushanfar. Spring 2009. 2. Summary. Substitution ciphers. Permutations. Making good ciphers . DES. AES. Slides are courtesy of Leszek T. Lilien from WMich. http://www.cs.wmich.edu/~llilien/. The data encryption standard (DES). Online Cryptography Course Dan Boneh. Block ciphers: crypto work horse. E, D. CT Block. n. bits. PT Block. n. bits. Key. k Bits. Symmetric ciphers . 2. part 1. Block ciphers - definition. Block cipher . encipherment . provides confidentiality by transforming a plaintext message into a ciphertext message, by means of a special function.. Algorithms. Scott Chappell. What is Cryptography?. Definition: the art of writing or solving codes. Basic Encryption Methods. Caesar Shift. Simple Substitution Cipher. Fun to use, but are easily cracked by computers and even by humans. Block Ciphers. Slides Original Source:. M. Stamp, “Information Security: Principles and Practice,” John Wiley. C. . Paar. and J. Pelzl, “Understanding Cryptography – A Textbook for Students and Practitioners,” . Online Cryptography Course Dan Boneh. Block ciphers: crypto work horse. E, D. CT Block. n. bits. PT Block. n. bits. Key. k . bits. Canonical examples:. 3DES: n= 64 bits, k = 168 bits. CS 161: Computer Security. Prof. . Raluca. Ada . Popa. Sept 13, 2016. Announcements. Project due Sept 20. Special guests. Alice . Bob. The attacker (Eve - “eavesdropper”, Malice). Sometimes Chris too. Substitution. Classical Ciphers. Transposition. Data Encryption Standard 1977. Modern Cryptography. “New Directions in Cryptography” 1976. Symmetric . key block ciphers. Public key ciphers. Stream ciphers. David . Brumely. Carnegie Mellon University. Credits:. Slides originally designed by David . Brumley. . . Many. other slides are from Dan . Boneh’s. June 2012 . Coursera. . crypto class.. What is a block cipher?. DES, AES . TEK4500. 01.09.2020 . Håkon Jacobsen. hakon.jacobsen@its.uio.no. Ideal solution: secure channels. 2. Internet. Alice. Bob. M. Adversary. Security goals:. Data privacy: . adversary should not be able to read message M . Slides Original Source:. M. Stamp, “Information Security: Principles and Practice,” John Wiley. C. . Paar. and J. Pelzl, “Understanding Cryptography – A Textbook for Students and Practitioners,” .