lecture iv : secret key cryptography

Oct 02, 2011

250 likes | 395 Vues

Internet Security - Secret Key Cryptography. 2. Outline. Basic ConceptsCyptanalytic AttacksInformation-theoretic vs. Computational-difficult CryptographyBlock vs. Stream CiphersSymmetric Block Cipher

Share Presentation

Embed Code

Link

Patman

Télécharger la présentation

lecture iv : secret key cryptography

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

Basic Cryptography

Basic Cryptography Cryptography  Greek for “ secret writing ” Robert Thibadeau School of Computer Science Carnegie Mellon University Today Cryptography I (40 Min) Break 9:20 (10 Min) Cryptography II 9:30 (30 Min) Weekly Quiz 10 IPAAA for data/messages

1.07k views • 50 slides

Lecture 3 Introduction to Cryptography

Lecture 3 Introduction to Cryptography. Outline. basics of cryptology private key cryptography public key cryptography digital signatures. Why Study cryptology(1). A. B. Intruder. Communications security. Why Study cryptology(2). Customer. Merchant. TTP. Electronic Commerce Security.

1.47k views • 99 slides

PKI Overview

PKI Overview. Tim Polk, NIST wpolk@nist.gov. Background. Secret key cryptography works, but key management is a nightmare Public key cryptography uses two keys one that is secret to the “owner” one that is widely available And all our problems were solved? who’s key is this anyway?

587 views • 33 slides

Visual Cryptography

Visual Cryptography. Jiangyi Hu. Visual Cryptography. Example Secret sharing Visual cryptography Model Extensions. Example. What is visual cryptography?. Secret Sharing. The General Idea All n parties can get together and recover secret s .

682 views • 26 slides

Issues in Cryptography

Issues in Cryptography. Ronald L. Rivest MIT Laboratory for Computer Science. Outline. “Where’s Alice?” ---The Secure Platform Problem Digital Signatures Repudiation. The “Alice abstraction”. Assumes Alice can generate and use her secret key SK A , while keeping it secret.

382 views • 20 slides

COS 433: Cryptography

COS 433: Cryptography . Princeton University Spring 2010 Boaz Barak. Please stop me if you have questions!. Cryptography. History of 2500- 4000 years. Throughout most of this history: cryptography = “secret writing”:

359 views • 24 slides

Lecture 02 Symmetric Cryptography

Lecture 02 Symmetric Cryptography. Asst.Prof. Supakorn Kungpisdan, Ph.D. supakorn@mut.ac.th. Outline. Overview of Cryptography Symmetric Cryptography Classical Cryptographic Techniques Block Ciphers VS Stream Cipher DES and 3DES Advanced Encryption Standard (AES)

2.19k views • 149 slides

Secrets & Lies, Knowledge & Trust. (Modern Cryptography)

Secrets & Lies, Knowledge & Trust. (Modern Cryptography). COS 116 4/14/2011 Instructor: Sanjeev Arora. Cryptography : 1 : secret writing 2 : the enciphering and deciphering of messages in secret code or cipher. Ancient ideas: (pre-1976) Complexity-based cryptography (post-1976).

454 views • 25 slides

What is cryptography?

Online Cryptography Course Dan Boneh. Introduction. What is cryptography?. Crypto core. Talking to Alice. Talking to Bob. Secret key establishment: Secure communication:. Alice. Bob. a ttacker???. m 1. k. k. m 2. c onfidentiality and integrity.

255 views • 9 slides

COS 433: Cryptography

425 views • 24 slides

Cryptography

Cryptography. Well, a gentle intro to cryptography. Special Thanks: to our friends at the Australian Defense Force Academy for providing the basis for these slides. Definition. Cryptology is the study of secret writing Concerned with developing algorithms which may be used:

551 views • 43 slides

Cryptography Computations

encrypt. Cryptography Computations. plaintext. ciphertext. By: Jorge L. Salazar. Outline. Cryptography Traditional cryptography, statistical attacks, Secret-key encryption, Public-key encryption. RSA cryptosystem (§10.2.3) Euler’s theorem, Algorithms for RSA

463 views • 28 slides

Public Key Cryptography and RSA ”

INCS 741: Cryptography. Public Key Cryptography and RSA ”. Dr. Monther Aldwairi New York Institute of Technology- Amman Campus 11/9/2009. Private-Key Cryptography. traditional private/secret/single key cryptography uses one key shared by both sender and receiver

509 views • 29 slides

A brief introduction to cryptography

A brief introduction to cryptography. by K. Kuypers. Scenario. TOP SECRET. message. Solution: Cryptography. Greek: kryptos = “hidden, secret” grapho = “I write” Applications: Sending messages during war Sending messages between lovers Security of ATM cards

289 views • 15 slides

Ch 5: Public-key Cryptography

Information and Network Security. Ch 5: Public-key Cryptography. Outlines. Principles of Public-Key Cryptography The RSA Algorithm. Classical Cryptography: Secret-Key or Symmetric Cryptography. Alice and Bob agree on an encryption method and a shared key .

1.23k views • 18 slides

Cryptography & Network Security

Cryptography & Network Security. Cryptography components. Cryptography, a word with Greek origins, means “secret writing.” However, we use the term to refer to the science and art of transforming messages to make them secure and immune attacks. Cryptography components.

705 views • 22 slides

Introduction to Cryptography

Introduction to Cryptography. EE 5900 Fall 03. Outline. Introduction to Cryptography Secret Key Cryptography Public Key Cryptography Hash Algorithms. Cryptography: Definitions. Idea: process data into unintelligible (confidentiality) form, reversible , without data loss

726 views • 18 slides

RSA Public Key Encryption Algorithm

RSA Public Key Encryption Algorithm. The best known public key cryptosystem is RSA - named after its authors, Rivest, Shamir and Adelman. Secret Key Cryptography Problems. Traditional (secret key) cryptography uses a single key shared by both sender and receiver. This has some drawbacks:

776 views • 43 slides

Lecture 03 Public-key Cryptography

Lecture 03 Public-key Cryptography. Asst.Prof. Supakorn Kungpisdan, Ph.D. supakorn@mut.ac.th. Outline. Public-key Cryptography RSA Digital Signature Key Management Diffie-Hellman Key Exchange. Limitations of Symmetric-key Cryptography.

1.03k views • 78 slides

Internet security

Internet security. Cryptography. Cryptography. Cryptography is derived from the word ‘Kryptos’ which means hidden or secret. Cryptography. Cryptography is thought to date back to the Egyptians and their use of hieroglyphics. Cryptography. Hieroglyphics were complex pictograms.

457 views • 17 slides

Chapter 9: Public Key Cryptography

Chapter 9: Public Key Cryptography. Private-Key Cryptography. traditional private/secret/single key cryptography uses one key shared by both sender and receiver if this key is disclosed communications are compromised also is symmetric , parties are equal

600 views • 34 slides

Cryptography and Secret Codes

Cryptography and Secret Codes. or one reason that linear equations are cool. Basic Cryptography Code. Romans would use this type of code Here “LINEAR” becomes “ OLQHDU ” What would “ HTXDWLRQ ” be?. Numerical Code. We can do more if we change letters into numbers:

399 views • 11 slides

More Related

lecture iv : secret key cryptography

lecture iv : secret key cryptography

Presentation Transcript

Basic Cryptography

Lecture 3 Introduction to Cryptography

PKI Overview

Visual Cryptography

Issues in Cryptography

COS 433: Cryptography

Lecture 02 Symmetric Cryptography

Secrets &amp; Lies, Knowledge &amp; Trust. (Modern Cryptography)

What is cryptography?

COS 433: Cryptography

Cryptography

Cryptography Computations

Public Key Cryptography and RSA ”

A brief introduction to cryptography

Ch 5: Public-key Cryptography

Cryptography &amp; Network Security

Introduction to Cryptography

RSA Public Key Encryption Algorithm

Lecture 03 Public-key Cryptography

Internet security

Chapter 9: Public Key Cryptography

Cryptography and Secret Codes

Secrets & Lies, Knowledge & Trust. (Modern Cryptography)

Cryptography & Network Security