PPT-Symmetric Encryption Example: DES

Weichao Wang 2 Overview of the DES A block cipher encrypts blocks of 64 bits using a 64 bit key outputs 64 bits of ciphertext A product cipher basic unit is the bit performs both substitution and transposition permutation on the bits. CSE 5351: Introduction to Cryptography. Reading assignment:. Chapter 2. Chapter 3 (sections 3.1-3.4). You may skip proofs, but are encouraged to read some of them.. 2. Computational Difficulty (One-Way Functions). 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. 1. Lost Laptops. Lost and stolen laptops are a common occurrence. Estimated occurrences in US airports every week: 12,000. Average cost of a lost laptop for a corporation is $50K. Costs include data breach, intellectual property loss, forensics, lost productivity, legal and regulatory expenses. Fifth Edition. by William Stallings. Chapter 2. Symmetric Encryption and . Message Confidentiality. Some Basic Terminology. Plaintext - original message . Ciphertext - coded message . Cipher - algorithm for transforming plaintext to ciphertext . Cryptography. Is:. A tremendous tool. The basis for many security mechanisms. Is not:. The solution to all security problems. Reliable unless implemented and used properly. Something you should try to invent yourself. modified from slides of . Lawrie. Brown. Cryptographic Tools. Cryptographic . algorithms . important . element in security . services. review various types of elements. symmetric encryption. public-key (asymmetric) encryption. Note: some of the slides used in this presentation are derived from those . available for the book “Computer Security: Principles and Practice”, by Stallings and Brown, PEARSON. Prof. Murtuza Jadliwala. Crypto Concepts Symmetric encryption, Public key encryption, and TLS Cryptography Is: A tremendous tool The basis for many security mechanisms Is not: The solution to all security problems Reliable unless implemented and used properly 1LabsEncrypt and decrypt a message with a symmetric encryption algorithm for example DES AES IDEA 3DES etcEncrypt a text message with a symmetric encryption algorithm and email it to one of the 1LabsD This algorithm adopted in 1977 by the National Institute of Standards and Technology (. NIST. ). The algorithm itself is referred to as the Data Encryption Algorithm (. DEA. ). For DES, data are encrypted in . Start Here--- http://bit.ly/41tCa3z ---Get complete detail on DES-5222 exam guide to crack Dell EMC Data Center PowerSwitch Specialist Exam for Implementation Engineer. You can collect all information on DES-5222 tutorial, practice test, books, study material, exam questions, and syllabus. Firm your knowledge on Dell EMC Data Center PowerSwitch Specialist Exam for Implementation Engineer and get ready to crack DES-5222 certification. Explore all information on DES-5222 exam with number of questions, passing percentage and time duration to complete test. Dell EMC DES-5222 exam study guide is designed to help you prepare for the Data Center PowerSwitch Implementation Engineer certification exam. It contains a detailed list of the topics covered on the Professional exam, as well as a detailed list of preparation resources. Get complete detail on DES-5122 exam guide to crack Dell EMC PowerSwitch Campus Networking Specialist Exam for Implementation Engineer. You can collect all information on DES-5122 tutorial, practice test, books, study material, exam questions, and syllabus. Firm your knowledge on Dell EMC PowerSwitch Campus Networking Specialist Exam for Implementation Engineer and get ready to crack DES-5122 certification. Explore all information on DES-5122 exam with number of questions, passing percentage and time duration to complete test. Techniques . Symmetric Cipher Model. Basic terminology:. Plaintext:. original message to be encrypted. Cipher text: . the encrypted message. Enciphering or encryption Algorithm: . The process of converting plaintext into cipher text..