PPT-Diffie

Hellman Key Exchange CSCI 5857 Encoding and Encryption Outline Key exchange without publicprivate keys Public and private components of Diffie Hellman Secure information exchange in Diffie. Hellman Abstract Two kinds of contemporary developments in cryp communications over an insecure channel order to use cryptog tography are examined Widening applications of teleprocess raphy to insure privacy however it currently necessary for the in -Hellman Key Exchange. CSCI 5857: Encoding and Encryption. Outline. Key exchange without public/private keys. Public and private components of . Diffie. -Hellman. Secure information exchange in . Diffie. Paint Secret Colours Secret Colours Common Secret Public Transport SSL Best Practices https://www.ssllabs.com/projects/best-practices/ !Add some timeouts to provide correct Finished message "!Profit! Changes Everything. Jaime Teevan, Microsoft Research. The Web Changes Everything. Content Changes. January February March April May June July August September. The Web Changes Everything. The . Diffie. -Hellman protocol. Online Cryptography Course Dan Boneh. Key exchange without an online TTP?. Bob. Alice. Goal. : . Alice . and Bob . want shared secret, . References:. Applied Cryptography, Bruce Schneier. Cryptography and Network Securiy, Willian Stallings. Outlines. Primitives Root. Discrete Logarithm. Diffie-Hellman. ElGamal. Shamir’s Three Pass Protocol. Announcements. Essay due. Next homework – crypto (on paper). This week: more on encryption and authentication, then on to access control. Last time: symmetric key cryptography. Based on shared knowledge of a private key. Dept. of Computer and Communication. Secure . Diffie. -Hellman Algorithm . By:. Assist. Lect. . Alnawar. J. . Mohammed. Assist. Lect. . Zahraa. D. . Abdulhadi. Introduction. Nowadays, data security and privacy are a . www.pluralsight.com. Goals. Encrypting Data. Diffie Hellman Elliptical Curve Key Exchange. Validation and Encryption with Certificates. Data Loss Prevention. Wireshark Demo. Web Browser Encryption. Negotiate Encryption Session . ). Shared Key Exchange Problem. How do Alice and Bob exchange a shared secret?. Offline. Doesn’t scale. Using specially crafted messages (. Diffie. -Hellman). Using a trusted third party (KDC). Secrets should never be sent in clear. Public key encryption from Diffie -Hellman The ElGamal Public-key System Online Cryptography Course Dan Boneh Recap: public key encryption: (Gen, E, D) E D -Hellman key exchange. k. 1. = (h. 2. ). x. = . g. xy. k. 2. = (h. 1. ). y. = . g. xy. h. 1. h. 2. G, q, . g. x .  . ℤ. q. h. 1. = . g. x. y .  . ℤ. q. h. 2. = . g. y. Security?. Eavesdropper sees G, q, g, . Lecture 10. Foundations of Cryptography. Today: . Constructions of Public-Key Encryption. 1: . Trapdoor Permutations (RSA). 2:. Quadratic . Residuosity. /Goldwasser-Micali. 3:. Diffie-Hellman/El Gamal. Jaime Teevan, Susan T. Dumais, Daniel J. Liebling, and Richard L. Hughes. Microsoft Research. Information Artifacts Change. Digital Dynamics Easy to Capture. Web Dynamics. January February March April May June July August September.