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Cipher Techniques

Cipher Techniques

Cipher Techniques. CS498SH Fall 2005. Based on slides provided by Matt Bishop for use with Computer Security: Art and Science. Reading. Chapter 11 in Computer Science: Art and Science, Chapter 10 in Introduction to Computer Security Can also look at Standards Documents. Overview. Problems

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1.28k views • 104 slides
Part 9, Basic Cryptography

Part 9, Basic Cryptography

Part 9, Basic Cryptography. Introduction. A cryptosystem is a tuple: ( M,K,C, E,D ) where M is the set of plaintexts K the set of keys C the set of ciphertexts E: M ? K ? C is an enciphering function D: C ? K ? M is a deciphering function. The Caesar cipher.

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703 views • 59 slides
Network Security: Protocol Analysis, Firewalls

Network Security: Protocol Analysis, Firewalls

Network Security: Protocol Analysis, Firewalls. Tuomas Aura. Protocol analysis: Classic key-exchange protocols and flaws. Needham-Schroeder secret-key protocol. The first secret-key key-exchange protocol 1978 Kerberos is based on this protocol

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826 views • 53 slides
Protocols Chapter 2

Protocols Chapter 2

Protocols Chapter 2. Protocol: A series of steps, involving two or more parties, designed to accomplish a task. All parties involved must know the protocol All parties must agree to follow it Must be unambiguous Must be complete. The Players dramatis personae. Alice First participant

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655 views • 50 slides
EE515/IS523 Think Like an Adversary Lecture 3 Cryptography in a Nutshell

EE515/IS523 Think Like an Adversary Lecture 3 Cryptography in a Nutshell

EE515/IS523 Think Like an Adversary Lecture 3 Cryptography in a Nutshell. Yongdae Kim. Recap. http://syssec.kaist.ac.kr/courses/ee515 E-mail policy Include [ee515] or [is523] in the subject of your e-mail Student Survey http://bit.ly/SiK9M3 News posting

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499 views • 37 slides
CS363

CS363

Week 1 - Friday. CS363. Last time. What did we talk about last time? Computer criminals Methods of defense Cryptography basics. Questions?. Project 1. Security tidbit of the day.

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536 views • 36 slides
Security

Security

CS423UG Operating Systems . Security. Indranil Gupta Lecture 37 Nov 28, 2005. Content. 9.1 The security environment 9.2 Basics of cryptography 9.3 User authentication 9.4 Attacks from inside the system 9.5 Attacks from outside the system

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384 views • 22 slides
Introduction to Information Security Chapter II : Classical Ciphers

Introduction to Information Security Chapter II : Classical Ciphers

Introduction to Information Security Chapter II : Classical Ciphers. Contents . History of cryptographic research Substitution ciphers Caesar ciphers Affine ciphers Monoalphabetic substitution cipher Homophonic substitution cipher Polyalphabetic substitution cipher

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359 views • 16 slides

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