PPT-1 Symmetric-Key Encryption

CSE 5351 Introduction to Cryptography Reading assignment Chapter 2 Chapter 3 sections 3134 You may skip proofs but are encouraged to read some of them 2 Computational Difficulty OneWay Functions. Aalto . University. , . autumn. . 2012. Outline. Symmetric encryption. Public-key encryption. Cryptographic authentication. 2. Most. . important. !. Brief. . introduction. to . encryption. and . 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. Name : . Maryam Mohammed . Alshami. ID:. H00204657. Encryption. : . is the process of encoding messages or information in such a way that only authorized parties can read it. .. Important part of computing to keep our file . usna. . si110. Symmetric Encryption Limitations. Symmetric encryption algorithms use the . same key for encryption and decryption. Both parties must agree to a secret key. Fundamental limitation. How do you exchange a secret key?. A network LAN can be secured through:. Device hardening. AAA access control. Firewall features. IPS . implementations. How is network traffic protected when traversing the public Internet? . Using cryptographic . Presented By:. Rahul. M.Tech. CSE, GBPEC . Pauri. Contents. Introduction. Symmetric memory architecture. Advantages. The limitations. Addressing the limitations. Problem with more than one copy in caches. October 2015. What’s New in PKI and SSL?. The State of PKI and SSL/TLS. Many organizations don’t run their own Public Key Infrastructure. Utilize a managed PKI, or MPKI. Almost all organizations have a website and need public certificates. Rainbows (a.k.a. Spectrums). Public Private Key Encryption. HTTPS. Encryption. String Encryption. You have an account on . facebook. , LinkedIn, YouTube etc. . Your login: . costanza@seinfeld.com. Your password is : . 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. 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 Slides by Prof. Jonathan Katz. . Lightly edited by me.. Review: private-key setting. Two (or more) parties who wish to securely communicate . share. a uniform, secret key k . in advance. Same key k used for sending or receiving. Symmetric . Key Distribution Using Asymmetric Encryption . Distribution . of Public Keys. Key Management and Distribution. Symmetric Key Distribution Using Symmetric Encryption. For symmetric encryption to work, the two parties to an exchange must . Rajat Mittal. (IIT Kanpur) . Boolean functions. or . Central object of study in Computer Science. AND, OR, Majority, Parity. With real range, real vector space of dimension . Parities for all . , .