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 Elliptic Curve Cryptography. CSCI 5857: Encoding and Encryption. Outline. Encryption as points on ellip. tic curves in space. Elliptic curves and modular arithmetic. Mathematical operations on elliptic curves. Dmitry . Belyavskiy. , TCI. ENOG 9, Kazan, June 9-10, 2015. Attack of 2015. – . FREAK. Historical reasons. A lot of browsers. A lot of web-servers. 512. -bit temporary RSA is not secure!. CVE-2015-0204. Security and Cryptographic Algorithms. Dr Sandra I. Woolley. Contents. A summary of security threats and requirements. Cryptography vs steganography. Keys and the Caesar cipher. Cryptanalysis. The Vigenère cipher. 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. against. Malicious Adversaries. Peter Rindal. Mike Rosulek. Private Set Intersection (PSI).  .  .  . Private Set Intersection (PSI).  .  .  . .  . “Sender”. “Receiver”. App: Contact discovery. CSE3002 – History of Computing. Group A: Daniel . Bownoth. , Michael Feldman, Dalton Miner, Ashley Sanders. Encryption. The process of securing information by transforming it into code.. Encrypted data must be deciphered, or . 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 . ). 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 Prof. David . Singer . Dept. of . Mathematics. Case Western Reserve University. Fall 2012. Modern Cryptography. New Directions in Cryptography,. by Whitfield . Diffie. and Martin Hellman, 1976.. Whitfield . -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, . Let G be a finite group of order . q . (written multiplicatively). Let g be some element of G. Consider the set <g> = {g. 0. , g. 1. , …}. We know . g. q. . = 1 = g. 0. , so the set has ≤ . 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.