PDF-Cryptosystems Provably Secure against Chosen Ciphertext Attacks ...

Naor IBM Research Almaden Research Center 650 Harry Road SanJose CA 95120 Moti Yung IBM Research TJ Watson Research Center Yorktown Heights NY 10598 extended abstract show how to construct. Chosen . ciphertext. attacks. Online Cryptography Course Dan Boneh. Example chosen . ciphertext. attacks. A. dversary has . ciphertext. c that it wants to decrypt. Deuteronomy 30:11-20. The Chosen. “It . was not because you were more in number than any other people that the L. ORD. set his love on you and chose you, for you were the fewest of all . peoples,. Attacks & Countermeasures. Chris Karlof & David Wagner, UC Berkeley. 1. st. IEEE International Workshop on Sensor Network Protocols & Applications 11 May 2003. Report by Jim Gaskell. CS 577, Prof Kinicki, Fall '11. Core Concepts. Dr. Kerry A. McKay. 1. Approved for Public Release. Distribution Unlimited 13-1379. All materials is licensed under a Creative Commons . “. Share Alike. ”. license.. http://creativecommons.org/licenses/by-sa/3.0/. certificateless. short signature scheme. Authors: K.Y. Choi, J.H. Park, D.H. Lee. Source:. . Comput. . Math. Appl. .. . (. IF:1.472). Vol. 61, 2011, pp. 1760-1768 . Presenter: Yu-Chi Chen. Outline. Dana . Dachman. -Soled. University of Maryland. danadach@ece.umd.edu. Cryptography. Public Key Encryption. Digital Signatures. Secure Multiparty Computation. Attacks. Even on “provably secure” schemes such as RSA. Kyle Johnson. Cryptology. Comprised of both Cryptography and Cryptanalysis. Cryptography. . - which . is the . practice and study of techniques for secure communication in the presence of third parties. Stuart Russell. University of California, Berkeley. [joint work with Dylan . H. adfield-Menell, Smitha . Milli. , Andrew . Critch. , Anca Dragan, Pieter Abbeel, Tom Griffiths]. Eventually, AI systems will make . Diffie. -Hellman. The . ElGamal. . Public-key System. Online Cryptography Course Dan Boneh. Recap: public key encryption: . (Gen, E, D). E. D. pk. m. c. c. m. Jason Franklin. With . Anupam. . Datta. , Deepak . Garg. , . Dilsun. . Kaynar. . CyLab, Carnegie Mellon University. Motivation: Secure Access to Financial Data. 2. . Network. Goal:. . An end-to-end trusted path in presence of local and network adversaries. Cryptography Lecture 3 So far… “Heuristic” constructions; construct, break, repeat, … Can we prove that some encryption scheme is secure? First need to define what we mean by “secure” in the first place… Chosen People Choose Life Deuteronomy 30:11-20 The Chosen “It was not because you were more in number than any other people that the L ORD set his love on you and chose you, for you were the fewest of all ~Amariah Condon. ~Janette Fong. ~Janice Lau. Cryptography. Definition – . JANETTe. Cryptography is the study of techniques for secure communication in the presence of third parties.. Applications of cryptography include ATM cards, computer passwords, etc.. Characterizing collaborative/coordinated attacks. Types of collaborative attacks. Identifying Malicious activity. Identifying Collaborative Attack. . . 3. Collaborative Attacks. Informal definition:.