PPT-Using block ciphers Review: PRPs and PRFs

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. Demijan. . Klinc. * . Carmit. . Hazay. † . Ashish. . Jagmohan. **. Hugo . Krawczyk. ** . Tal Rabin. **. * . Georgia . Institute of . Technology. ** . IBM T.J. Watson Research . Labs. † . Configuration. WebSec. 101. mike.andrews@foundstone.com. mike@mikeandrews.com. Intro Music by . DoKashiteru. via . CCMixter. Nothing in isolation. Network. Operating System. Libraries. Web server. 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.. Thm. : . If . G. is a PRG, then the fixed-length stream cipher . (Gen, . Enc. , Dec) . described below has . indistinguishable encryptions in the presence of an eavesdropper. .. 0. Plaintexts. and . Review: PRPs and PRFs. 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:. Information and Network Security. . Dr. . Hadi. AL . Saadi. The objective of this chapter is to illustrate the principles of . modern symmetric ciphers. .. 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. Canonical examples:. 3DES: n= 64 bits, k = 168 bits. 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?. 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. Using Linear Algebra. Brian Worthington. University of North Texas. MATH 2700.002. 5/10/2010. Hill Ciphers. Created by Lester S. Hill in 1929. Polygraphic Substitution Cipher. Uses Linear Algebra to Encrypt and Decrypt. 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 . Online Cryptography Course Dan Boneh. Symmetric Ciphers: definition. Def. : a . cipher. defined over . . is a pair of “efficient” . algs. (. E. , . D.