PPT-Cryptanalysis

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. Alice Bob insecure hannel Ev ea esdropp er brPage 3br cryptosystem or cipher is pro cedure to render messages unin telligible except to the authorized or in tended recipien t Alice plain text Encrypt Bob Decrypt original text Ev ciphertext secure ha /CS594 . Computer and Network Security. Dr. . Jinyuan. (Stella) Sun. Dept. of Electrical Engineering and Computer Science. University of Tennessee . Fall . 2011. 1. Introduction to Cryptography. What is cryptography?. Classical Encryption Techniques. "I am fairly familiar with all the forms of secret writings, and am myself the author of a trifling monograph upon the subject, in which I analyze one hundred and sixty separate ciphers," said Holmes.. Session 4. Contents. Linear cryptanalysis. Differential cryptanalysis. 2. /48. Linear cryptanalysis. Known plaintext attack. The cryptanalyst has a set of plaintexts and the corresponding ciphertexts. Sixth Edition. by William Stallings . Chapter 3. Block Ciphers and the Data Encryption Standard. “But . what is the use of the cipher message without the cipher. ?”. -- The Valley of Fear, . Sir Arthur Conan Doyle. IntSi1. ). Prof. Dr. Andreas Steffen. Institute for Internet Technologies and Applications (ITA). 2 Introduction to Cryptology. What is Cryptology?. Cryptology is a branch of mathematics !!. Cryptology. a connection between language and mathematics. Introduction. Cryptography. : the procedures, processes, methods, etc., of making and using secret writing, as codes or ciphers. crypto-: “hidden” or “secret”; -. Sixth Edition. by William Stallings . Chapter 3. Block Ciphers and the Data Encryption Standard. “All the afternoon Mungo had been working on Stern's code, principally with the aid of the latest messages which he had copied down at the Nevin Square drop. Stern was very confident. He must be well aware London Central knew about that drop. It was obvious that they didn't care how often Mungo read their messages, so confident were they in the impenetrability of the code.”. Computer and Network Security. Dr. . Jinyuan. (Stella) Sun. Dept. of Electrical Engineering and Computer Science. University of Tennessee . Fall 2011. 1. Secret Key Cryptography. Block cipher. DES. CSCI 5857: Encoding and Encryption. Outline. Confusion and diffusion. Attacks and weaknesses. Linear . c. ryptanalysis attacks. Weak keys. Exhaustive search attacks. Use of multiple keys. Meet in the middle attacks. Chapter 2, Elementary Cryptography. Summary created by. Kirk Scott. 1. 1. Notation. S = Sender. R = Recipient or Receiver. T = Transmission Medium. O = Outsider, possibly an Interceptor or Intruder. week01-crypto.ppt. 1. Introduction to Basic Crypto Schemes. In order to achieve confidentiality but at the same communicate/exchange information with intended parties, the information must be hidden from others. Introduction . & Overview. Contents from Prof. . . Kwangjo. . Kim and Other Sources. Syllabus Overview. Basic . terms . Quick . overview on information security . Course Detail. Objectives:. . The Desired Brand Effect Stand Out in a Saturated Market with a Timeless Brand