[3ICT1] Security - Cryptography -

Cryptography. OverviewQuick History, Fundamentals, Threats

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Network Security Cryptography

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Security and Cryptography

Security and Cryptography. Security: all issues which make secure communication (information transmission, two (multiple) party interaction) over insecure channels . Cryptography: the science and art of manipulating messages to make them secure. Classical cryptographic techniques.

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Security and Cryptography

Security and Cryptography. CSE 461 Ben Greenstein Jeremy Elson TA: Ivan Beschastnikh. Administrivia. Project 3, part 2 due December 5 Special extended office hours: Tuesday, December 2, 11:30-1:30 Room 218 No HW this week. Security in Practice. Attackers have the advantage

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Cryptography in Internet Security

Cryptography in Internet Security. Prabhaker Mateti. Computationally Infeasible. certain computation that we are talking about takes way too long (hundreds of years)  to compute using the fastest of (super) computers.  128-bit numbers 340,282,366,920,938,463,463,374,607,431,768,211,456

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Computer Security -- Cryptography

Computer Security -- Cryptography. Chapter 3 Key Management Message Authentication Digital Signature. Part 1 Key Management. Key Distribution in Symmetric System. symmetric schemes require both parties to share a common secret key issue is how to securely distribute this key

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Cryptography and Network Security

Cryptography and Network Security. Sixth Edition by William Stallings . Chapter 9. Public Key Cryptography and RSA.

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Security and Cryptography

Security and Cryptography. Security Threats. Impersonation Pretend to be someone else to gain access to information or services Lack of secrecy Eavesdrop on data over network Corruption Modify data over network Break-ins Take advantage of implementation bugs Denial of Service

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CRYPTOGRAPHY AND INFORMATION SECURITY

CRYPTOGRAPHY AND INFORMATION SECURITY. Lecturer: Dr. Nguyen Nam Hong Tel.: 048781437. Mobi.: 0912312816. Email: nguyennamhong2003@yahoo.com.au Website: www.freewebs.com/namhongthanhloc. COURSE CONTENTS (1/4). 1. Introduction 2. Classical Encryption Techniques 3. Block Cipher

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Security Basics (Cryptography)

Security Basics (Cryptography). SSE USTC Qing Ding. Agenda. What is and Why network security? What security services do we need? Cryptographic process Public key vs. Secret key scheme Digital signing, Tamper-proofing & Encrypting Security (Cryptographic) technologies

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Security Definitions in Computational Cryptography

18739A: Foundations of Security and Privacy. Security Definitions in Computational Cryptography. Anupam Datta CMU Fall 2009. Cryptographic Concepts. Signature scheme Symmetric encryption scheme. Signature Scheme. Key generation algorithm Input: security parameter n

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CRYPTOGRAPHY AND INFORMATION SECURITY

CRYPTOGRAPHY AND INFORMATION SECURITY. Lecturer: Dr. Nguyen Nam Hong Tel.: 048781437. Mob.: 0912312816. Email: nguyennamhong2003@yahoo.com.au Website: www.freewebs.com/namhongthanhloc Chapter 16. Electronic Mail Security. Chapter 16. Electronic Mail Security (1/3).

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Computer Security -- Cryptography

Computer Security -- Cryptography. Chapter 2 Public-Key Encryption. Outline. Review of Number Theory Public-key Cryptography. Prime Numbers. prime numbers only have divisors of 1 and self they cannot be written as a product of other numbers

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Cyber Security/Information Security Definitions

Cyber Security/Information Security Definitions. Cyber Security/Information Security Types.

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Security and Cryptography

Security and Cryptography. Portions stolen from Prof. Sahai (spring 2001). December 4, 2001. Administrivia. Homework assignment 7 due today Homework Assignment 8 due January 7,2002 Homework 9 Part a due next Tuesday Part b due next Thursday Part c due next Friday Lab 8 this week

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Cryptography and Network Security

Cryptography and Network Security. Third Edition by William Stallings Lecture slides by Lawrie Brown. Chapter 9 – Public Key Cryptography and RSA.

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Security: Cryptography

Security: Cryptography. I206 Spring 2012 John Chuang. Some slides adapted from Coulouris, Dollimore and Kindberg; Dave Messerschmidt; Adrian Perrig. Eavesdropping passwords, credit card numbers, etc. Tampering of data Birthday attack Impersonation Replay attack

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Security & Cryptography

Security & Cryptography. Protection vs Security. The protection mechanisms (ACLs, etc) discussed earlier assist us in preventing unauthorized access and use of computer resources what happens if an intruder bypasses the protection mechanisms?

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Security and Cryptography

Security and Cryptography. Security: all issues which make secure communication (information transmission, two (multiple) party interaction) over insecure channels . Cryptography: the science and art of manipulating messages to make them secure. Classical cryptographic techniques.

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Security and Cryptography

Security and Cryptography. CS-502 Operating Systems Fall 2007 (Slides include materials from Operating System Concepts , 7 th ed., by Silbershatz, Galvin, & Gagne and from Modern Operating Systems , 2 nd ed., by Tanenbaum). Puzzle. Alice wishes to send secret message to Bob

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Security through Cryptography

Track 2 Workshop June 30, 2010 American Samoa Hervey Allen. Security through Cryptography. Securing your Server. So, you wanna secure your server? The usual steps apply: Run only what you need – nothing extra. Keep it up-to-date. Is your kernel “patchable”?

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