'Public key encryption' presentation slideshows

Database Security and Authorization

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Encryption & Cryptography

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630 views • 52 slides

Ethics in Information Technology, Second Edition

Ethics in Information Technology, Second Edition . Chapter 4 Privacy. Objectives. What is the right of privacy, and what is the basis for protecting personal privacy under the law?

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Public Key Encryption with keyword search

Public Key Encryption with keyword search. Author: Dan Boneh, Giovanni Di Crescenzo, Rafail Ostrovsky, Giuseppe Persiano. Presenter: ???. Problem. User1(Alice). User2(Bob). No interactive. send. receive. Untrusted mail server. outline. Public key encryption keyword search(PEKS)

769 views • 45 slides

William Stallings Data and Computer Communications

William Stallings Data and Computer Communications. Chapter 18 Network Security. Security Requirements. Confidentiality Integrity Availability. Passive Attacks. Eavesdropping on transmissions To obtain information Release of message contents Outsider learns content of transmission

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Protection and Security

Protection and Security. Definitions. Security : policy of authorizing accesses Prevents intentional misuses of a system Protection : the actual mechanisms implemented to enforce the specialized policy Prevents either accidental or intentional misuses. Security Goals.

467 views • 40 slides

CSC 482/582: Computer Security

CSC 482/582: Computer Security. Public Key Cryptography. Topics. Number Theory Review Public Key Cryptography One-Way Trapdoor Functions Diffie -Hellman Key Exchange RSA Cipher Modern Steganography. Number Theory Review. Prime Numbers Fundamental Theorem of Arithmetic

888 views • 38 slides

Lecture 17

Lecture 17. Security Introduction Cryptography basics Web Security and Vulnerabilities Network SecurityTools. What is Network Security?.

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Secure Communication for Distributed Systems

Secure Communication for Distributed Systems. Paul Cuff Electrical Engineering Princeton University. Main Idea. Secrecy for distributed systems Design encryption specifically for a system objective. Distributed System. Action. Node B. Message. Information. Node A. Attack. Adversary.

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3.3.6: Implications of ICT

3.3.6: Implications of ICT. Keeping data safe and why we need to. This presentation aims to:. Help you understand: How to discuss the need for keeping data confidential and explain how this is achieved.

374 views • 31 slides

Protection and Security How to be a paranoid or just think like one

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Chapter 3

Chapter 3 THE INTERNET, INTRANETS, AND ELECTRONIC COMMERCE The Internet electronic highway, consisting of various standards and protocols The Internet has no central command and control structure. TCP (Transmission Control Protocol)

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On The (Im)possibility of Software Obfuscation

On The (Im)possibility of Software Obfuscation. Boaz Barak. Joint work with Oded Goldreich, Russell Impagliazzo, Steven Rudich, Amit Sahai, Salil Vadhan and Ke Yang. What Is an Obfuscator?. An obfuscator : An algorithm O such that for any program P , O(P) is a program such that:

329 views • 22 slides

Encryption, SSL, & Certificates

Encryption, SSL, & Certificates. Maggie Wettergreen & Scott Crooks. Agenda. Encryption What is it? Why is it necessary? How does it work? Public Key Certificates Definition Usage Strengths & Weaknesses SSL/TLS (Secure Sockets Layer/ Transport Layer Security) Protocols Encryption

299 views • 17 slides

Cryptography Made Easy

Cryptography Made Easy. Stuart Reges Senior Lecturer. Why Study Cryptography?. Secrets are intrinsically interesting So much real-life drama: Mary Queen of Scots executed for treason primary evidence was an encoded letter they tricked the conspirators with a forgery Students enjoy puzzles

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Electronic Transaction Security (E-Commerce)

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Public Key Encryption 3

Public Key Encryption 3. Digital Signatures or The Box within a Box. Ken Coder sends Dee a secret message only she can unlock. It could have come from Pre Tender!. Yves Dropper's evil cousin. Ken's idea: Lock with my private key. Unlock with my public key: Only I could have sent it!.

210 views • 10 slides

Cryptography: Basic Concepts

Cryptography: Basic Concepts. Plaintext: message text M to be protected Ciphertext: encrypted plaintext C Key: A secret shared by sender and recipient Encryption: a mathematical transformation E of a plaintext into a cipher text using key K E(plaintext, K) = ciphertext E(M, K) = C

605 views • 5 slides