PPT-1 Symmetric-Key Encryption

CSE 5351 Introduction to Cryptography Reading assignment Chapter 3 Read sections 3132 first skipping 322 2 3 4 5 6 7 8 9 10 11 12 13 14 Pseudorandom Generators and Stream Ciphers. Aalto . University. , . autumn. . 2012. Outline. Symmetric encryption. Public-key encryption. Cryptographic authentication. 2. Most. . important. !. Brief. . introduction. to . encryption. and . Symmetric-key algorithms. use the same cryptographic keys for both encryption of plaintext and decryption of ciphertext. split into:. stream ciphers. block ciphers. Stream cipher. key and algorithm are applied to each binary digit in a data stream, one bit at a time. 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 . OGRAPHY. Dr. Andy Wu. BCIS . 4630 Fundamentals of IT Security. Overview. Key crypto concepts. Key terms. XOR. Symmetric encryption. Asymmetric encryption. Hashes. 2. Cryptography. Cryptography primarily protects confidentiality, integrity, authentication, and non-repudiation.. 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 . David Froot. Protecting data By encryption . How do we transmit information and data, especially over the internet, in a way that is secure and unreadable by anyone but the sender and recipient?. Encryption is simply the process of transforming information, such as plain text or numbers, using an algorithm. Only those with the algorithm can decipher the encrypted information, and even a relatively simple encryption technique can be difficult to decode without the key. . 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. Confidentiality, integrity, and availability concepts – CIA. Security Governance principles. Compliance, Legal, and Regulatory issues – SOX and Regulatory Guidelines – There will be memorization questions on the test. pk. , . sk. pk. c. . . . Enc. pk. (m). m. = . Dec. sk. (c). c. pk. pk. Public-key encryption. A public-key encryption scheme is composed of three PPT algorithms:. Gen: . key-generation algorithm. 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 Public key encryption from Diffie -Hellman The ElGamal Public-key System Online Cryptography Course Dan Boneh Recap: public key encryption: (Gen, E, D) E D 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. 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..