Modern Cryptography: An Introduction to Data Privacy and Integrity in the Digital World - , Study notes of Cryptography and System Security

Download Modern Cryptography: An Introduction to Data Privacy and Integrity in the Digital World - and more Study notes Cryptography and System Security in PDF only on Docsity! CS 6260 Applied Cryptography Alexandra (Sasha) Boldyreva Lecture 1: Introduction, perfect (Shannon) secrecy. All the information is at www.cc.gatech.edu/classes/AY2005/cs6260_spring/ Office hours: CCB 254, Tu 4:45-5:45 pm, W 2-3 pm Please answer the following questions: Your name Your department/major, Ph.D., M.S. or B.S., year in the program Why you are taking this class (required, curious, etc.) Your plans after the graduation (industry, research, etc.) Cryptography is very old and very new Crypto is an ancient discipline Recall Julius Caesar, Enigma,... Crypto as a science (modern cryptography) has short but exciting history Most of it happened in the last 30 years! This course will be an introduction to modern cryptography data privacy data authenticity (it came from where it claims) data integrity (it has not been modified on the way) in the digital world Main goals of cryptography are Who used some cryptography recently? 1 2 3 4 Crypto is used by most people when Doing on-line shopping and banking Talking on a cell phone Watching satellite TV and pay-per-view movies Players and settings S R A 1. Symmetric-key setting K K Players and settings S R A 2. Asymmetric (public)-key setting skr pkr ... ... R pkr ... ... pkr Goals and primitives setting goal symmetric-key asymmetric-key data privacy symmetric (secret-key) encryption asymmetric (public-key) encryption data authenticity/ integrity message authentication code (MAC) digital signature scheme 5 6 7 8