Bazara Barry1 Security on Networks and Information Systems Bazara I. A. Barry Department of Computer Science – University of Khartoum www.itrc.sd/staff/bazara.html.

Slides:

Advertisements

Similar presentations

Network Security Chapter 1 - Introduction.

Advertisements

Cryptography and Network Security 2 nd Edition by William Stallings Note: Lecture slides by Lawrie Brown and Henric Johnson, Modified by Andrew Yang.

Cryptography and Network Security Chapter 1

1 Network Security Ola Flygt Växjö University

Chapter 1 – Introduction

4/16/2017 Network Security Mehrdad Nourani.

1 Cryptography and Network Security Third Edition by William Stallings Lecturer: Dr. Saleem Al_Zoubi.

Security Overview Hofstra University University College for Continuing Education - Advanced Java Programming Lecturer: Engin Yalt May 24, 2006.

Blekinge Institute of Technology, Sweden

1 Network Security Derived from original slides by Henric Johnson Blekinge Institute of Technology, Sweden From the book by William Stallings.

Chapter 1 – Introduction The art of war teaches us to rely not on the likelihood of the enemy's not coming, but on our own readiness to receive him; not.

Computer and Information Security

Computer and Information Security Jen-Chang Liu, 2004

Applied Cryptography for Network Security

Introduction CS-480b Dick Steflik. X.800 – OSI Security Services Security Service – a service provided by a protocol layer of communicating open systems,

Henric Johnson1 Network Security /. 2 Outline Attacks, services and mechanisms Security attacks Security services Methods of Defense A model for Internetwork.

Cryptography and Network Security Chapter 1. Chapter 1 – Introduction The art of war teaches us to rely not on the likelihood of the enemy's not coming,

Cryptography and Network Security Overview & Chapter 1 Fifth Edition by William Stallings Lecture slides by Lawrie Brown Editied by R. Newman.

Cryptography and Network Security Third Edition by William Stallings Lecture slides by Lawrie Brown.

Cryptography and Network Security Chapter 1 Fourth Edition by William Stallings Lecture slides by Lawrie Brown.

Review security basic concepts IT 352 : Lecture 2- part1 Najwa AlGhamdi, MSc – 2012 /1433.

1 Cryptography and Network Security Fourth Edition by William Stallings Lecture slides by Lawrie Brown Changed by: Somesh Jha [Lecture 1]

Cryptography and Network Security Overview & Chapter 1 Fifth Edition by William Stallings Lecture slides by Lawrie Brown.

Dr. Lo’ai Tawalbeh 2007 INCS 741: Cryptography Chapter 1:Introduction Dr. Lo’ai Tawalbeh New York Institute of Technology (NYIT) Jordan’s Campus

Cryptography and Network Security Chapter 1

Cryptography and Network Security Overview & Chapter 1 Fifth Edition by William Stallings.

Cryptography and Network Security

Eng. Wafaa Kanakri Second Semester 1435 CRYPTOGRAPHY & NETWORK SECURITY Chapter 1:Introduction Eng. Wafaa Kanakri UMM AL-QURA UNIVERSITY

Network Security Essentials Chapter 1

Network Security Essentials Chapter 1 Fourth Edition by William Stallings (Based on Lecture slides by Lawrie Brown)

Introduction to Computer Security1 Information Security Principles Assistant Professor Dr. Sana’a Wafa Al-Sayegh 1 st semester University of.

Network Security Essentials Chapter 1

1 Introduction to Network Security Spring Outline Introduction Attacks, services and mechanisms Security threats and attacks Security services.

Chapter 1 Overview. The art of war teaches us to rely not on the likelihood of the enemy's not coming, but on our own readiness to receive him; not on.

Network Security Introduction Light stuff – examples with Alice, Bob and Trudy Serious stuff - Security attacks, mechanisms and services.

NETWORK SECURITY. TextBook William Stallings, Cryptography and Network Security: Principles and Practice, ? Edition.

1 University of Palestine Information Security Principles ITGD 2202 Ms. Eman Alajrami 2 nd Semester

Henric Johnson1 Network Security Henric Johnson Blekinge Institute of Technology, Sweden

©Dr. Respickius Casmir IT Security In a Nutshell – Session 1 By Dr. Respickius Casmir.

. 1. Computer Security Concepts 2. The OSI Security Architecture 3. Security Attacks 4. Security Services 5. Security Mechanisms 6. A Model for Network.

1 Chapter 1 – Background Computer Security T/ Tyseer Alsamany - Computer Security.

Topic 1 – Introduction Huiqun Yu Information Security Principles & Applications.

Network Security Introduction

Network Security and Cryptography

Cryptography and Network Security Chapter 1. Background  Information Security requirements have changed in recent times  traditionally provided by physical.

1 Network Security: Introduction Behzad Akbari Fall 2009 In the Name of the Most High.

Lecture1.1(Chapter 1) Prepared by Dr. Lamiaa M. Elshenawy 1.

By Marwan Al-Namari & Hafezah Ben Othman Author: William Stallings College of Computer Science at Al-Qunfudah Umm Al-Qura University, KSA, Makkah 1.

@Yuan Xue CS 285 Network Security Placement of Security Function and Security Service Yuan Xue Fall 2013.

@Yuan Xue CS 285 Network Security Fall 2012 Yuan Xue.

1 Network Security Maaz bin ahmad.. 2 Outline Attacks, services and mechanisms Security attacks Security services Security Mechanisms A model for Internetwork.

Prof. Wenguo Wang Network Information Security Prof. Wenguo Wang Tel College of Computer Science QUFU NORMAL UNIVERSITY.

Lecture 1 Introduction Dr. nermin hamza 1. Aim of Course Overview Cryptography Symmetric and Asymmetric Key management Researches topics 2.

Information Security Principles course “Cryptology” Based of: “Cryptography and network Security” by William Stalling, 5th edition. Eng. Mohamed Adam Isak.

Cryptography and Network Security

Cryptography and Network Security

Information System and Network Security

Information Security.

CNET334 - Network Security

Introduction Of Information Security

Information and Network Security

10CS835 Information Security

Cryptography and Network Security Chapter 1

Cryptography and Network Security Chapter 1

Qishi Wu University of Memphis

Cryptography and Network Security

Network Security Ola Flygt Växjö University

Cryptography and Network Security Chapter 1

The OSI Security Architecture

Cryptography and Network Security

Presentation transcript:

Bazara Barry1 Security on Networks and Information Systems Bazara I. A. Barry Department of Computer Science – University of Khartoum

Bazara Barry2 1 Introduction

Bazara Barry3 Outline Security trends The OSI security Architecture Security attacks Security services Security mechanisms A model for network security Internet standards and RFCs

Bazara Barry4 Security Trends (1-4) In 1994, the Internet Architecture Board (IAB) issued a report entitled "Security in the Internet Architecture". The report stated the general consensus that the Internet needs more and better security.

Bazara Barry5 Security Trends (2-4)

Bazara Barry6 Security Trends (3-4)

Bazara Barry7 Security Trends (4-4)

Bazara Barry8 The OSI Security Architecture The manager responsible for security needs some systematic way of defining the requirements for security and characterizing the approaches to satisfying those requirements. ITU-T Recommendation X.800, Security Architecture for OSI, defines such a systematic approach. The OSI security architecture focuses on security attacks, mechanisms, and services.

Bazara Barry9 Attacks, Services and Mechanisms Security Attack: Any action that compromises the security of information. Security Mechanism: A mechanism that is designed to detect, prevent, or recover from a security attack. Security Service: A service that enhances the security of data processing systems and information transfers. A security service makes use of one or more security mechanisms.

Bazara Barry10 Security Attacks

Bazara Barry11 Security Attacks

Bazara Barry12 Security Attacks Interruption: This is an attack on availability Interception: This is an attack on confidentiality Modification: This is an attack on integrity Fabrication: This is an attack on authenticity

Bazara Barry13 Security Goals Integrity Confidentiality Avalaibility

Bazara Barry14 Security Services Confidentiality (privacy) Authentication (who created or sent the data) Integrity (has not been altered) Non-repudiation (the order is final) Access control (prevent misuse of resources) Availability (permanence, non-erasure) – Denial of Service Attacks – Virus that deletes files

Bazara Barry15 Mechanism ServiceEncipherment Digital Signature Access Control Data Integrity Authentication Exchange Traffic Padding Routing ControlNotarization Peer entity authenticationYY Y Data origin authentication YY Access control Y ConfidentialityY Y Traffic flow confidentiality Y YY Data integrityYY Y Nonrepudiation Y Y Y Availability YY

Bazara Barry16 Security Mechanisms Specific security mechanisms (encipherment, digital signature, authentication exchange, traffic padding,…). Pervasive security mechanisms (trusted functionality, security label, event detection, security audit trail,…).

Bazara Barry17 A Model for Network Security (1-2)

Bazara Barry18 A Model for Network Security (2-2)

Bazara Barry19 Methods of Defense Encryption Software Controls (access limitations in a database, in operating system to protect each user from other users) Hardware Controls (smartcard) Policies (frequent changes of passwords) Physical Controls

Bazara Barry20 Internet standards and RFCs The Internet society –Internet Architecture Board (IAB) –Internet Engineering Task Force (IETF) –Internet Engineering Steering Group (IESG)

Bazara Barry21 Internet RFC Publication Process