PPT-Stream ciphers

Author : briana-ranney | Published Date : 2016-07-10

Stream ciphers are semantically secure Online Cryptography Course Dan Boneh Goal secure PRG semantically secure stream cipher Stream ciphers are semantically secure

Presentation Embed Code

Download Presentation

Download Presentation The PPT/PDF document "Stream ciphers" is the property of its rightful owner. Permission is granted to download and print the materials on this website for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.

Stream ciphers: Transcript

Stream ciphers are semantically secure Online Cryptography Course Dan Boneh Goal secure PRG semantically secure stream cipher Stream ciphers are semantically secure. 21 Fig 21 Main areas within cryptography This chapter gives an introduction to stream ciphers The pros and cons of stream ciphers Random and pseudorandom number generators A truly unbreakable cipher the OneTime Pad OTP Linear feedback shift register Pseudorandom Generators. Online Cryptography Course Dan Boneh. Review. Cipher over (K,M,C): a pair of “efficient” . algs. (. E. , . D. ) . s.t.. . ∀ . 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. 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/. /B. 609. :. . Introduction to. Cryptography. Fall 2015 . . Lecture 7. . Last Thursday’s lecture:. Quiz. Computationally secret . encryption. Today’s lecture:. Pseudorandom generators (PRGs). The One Time Pad. Online Cryptography Course Dan Boneh. Symmetric Ciphers: definition. Def. : a . cipher. defined over . . is a pair of “efficient” . algs. CSE 5351: Introduction to Cryptography. Reading assignment:. Chapter 3 . Read sections 3.1-3.2 first (skipping 3.2.2). 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. Pseudorandom Generators and Stream Ciphers. 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 . Unity Connection . 11.0. EDCS-1464707. Abbreviations. CUCA. - Cisco unity Connection Administration. REST. - Representational State Transfer. CSR . -. Certificate Signing Request. CA . - Certificate Authority. Substitution. Classical Ciphers. Transposition. Data Encryption Standard 1977. Modern Cryptography. “New Directions in Cryptography” 1976. Symmetric . key block ciphers. Public key ciphers. Stream ciphers. Online Cryptography Course Dan Boneh. Symmetric Ciphers: definition. Def. : a . cipher. defined over . . is a pair of “efficient” . algs. (. E. , . D. Faculty of Engineering Stream Cipher Course name: Data Encryption. Computer Engineering Dep. Lecturer: Fatimah Al-.

Download Document

Here is the link to download the presentation.
"Stream ciphers"The content belongs to its owner. You may download and print it for personal use, without modification, and keep all copyright notices. By downloading, you agree to these terms.