PPT-Public Key Cryptography: Secrecy in Public

Raymond Flood Gresham Professor of Geometry Overview Key terms and guidelines Caesar ciphers Substitution cipher Polyalphabetic cipher Enigma Modern ciphers Stream ciphers Block ciphers Diffie. Pseudorandom Generators. Online Cryptography Course Dan Boneh. Review. Cipher over (K,M,C): a pair of “efficient” . algs. (. E. , . D. ) . s.t.. . ∀ . CS 465. Last Updated. : . Aug 25, 2015. Outline. Provide a brief historical background of cryptography. Introduce definitions and high-level description of four cryptographic primitives we will learn about this semester. The One Time Pad. Online Cryptography Course Dan Boneh. Symmetric Ciphers: definition. Def. : a . cipher. defined over . . is a pair of “efficient” . algs. (Securing the Anti-Democracy). State secrets, warrantless investigations and wiretaps, signing statements, executive privilege—the executive branch wields many tools for secrecy. . Since . the middle of the twentieth century, presidents have used myriad tactics to expand and maintain a level of executive branch power unprecedented in this nation’s history. . Algorithms. Scott Chappell. What is Cryptography?. Definition: the art of writing or solving codes. Basic Encryption Methods. Caesar Shift. Simple Substitution Cipher. Fun to use, but are easily cracked by computers and even by humans. 1. Part I: Crypto. Chapter 2: Crypto Basics. MXDXBVTZWVMXNSPBQXLIMSCCSGXSCJXBOVQXCJZMOJZCVC. TVWJCZAAXZBCSSCJXBQCJZCOJZCNSPOXBXSBTVWJC. JZDXGXXMOZQMSCSCJXBOVQXCJZMOJZCNSPJZHGXXMOSPLH. JZDXZAAXZBXHCSCJXTCSGXSCJXBOVQX. 1. Part I: Crypto. Part 1 . . Cryptography . 2. Crypto. Cryptology . . The art and science of making and breaking “secret codes”. Symmetric Encryption. Key exchange . Public-Key Cryptography. Key exchange. Certification . Why Cryptography. General Security Goal. - . Confidentiality . (. fortrolig. ). - . End-point Authentication . Paul Cuff. Electrical Engineering. Princeton University. Secrecy. Source. Channel. Information Theory. Secrecy. Source Coding. Channel Coding. Source Coding. Describe an information signal (. source. Paul Cuff. Electrical Engineering. Princeton University. Secrecy. Source. Channel. Information Theory. Secrecy. Source Coding. Channel Coding. Main Idea. Secrecy for signals in distributed systems. Want low distortion for the receiver and high distortion for the eavesdropper.. 1. Administrative Note. Professor Blocki is traveling and will be back on Wednesday. . E-mail: . jblocki@purdue.edu. . Thanks to Professor Spafford for covering the first lecture!. 2. https://www.cs.purdue.edu/homes/jblocki/courses/555_Spring17/index.html. to’s. . u. sing . OpenSSL. In this session, we will cover cryptography basics and explore cryptographic functions, performance and examples using . OpenSSL. . . July 2012. LAB: . http://processors.wiki.ti.com/index.php/Sitara_Linux_Training:_Cryptography. The . art and science of concealing the messages to introduce secrecy in . information security . is recognized as cryptography. .. The word ‘cryptography’ was coined by combining two Greek words, ‘Krypto’ . Crypto is amazing. Can do things that initially seem impossible. Crypto is important. It impacts each of us every day. Crypto is fun!. Deep theory. Attackers’ mindset. Necessary administrative stuff.