System Network Security - E-Commerce - Lecture Slides, Slides of Fundamentals of E-Commerce

Download System Network Security - E-Commerce - Lecture Slides and more Slides Fundamentals of E-Commerce in PDF only on Docsity! System and Network Security Overview Docsity.com 2 What is network security about ?
It is about secure communication
What do we mean by secure communication?
Everything is connected by the Internet
We will often use Alice and Bob
Alice is on a vacation and wants to send a command to her assistant—Bob—or just a computer to control the nuclear power plant, how can she do that? Docsity.com 5 Cryptography
Cryptography allows us to disguise data so that eavesdroppers gain no information from listening
Cryptography also allows us to create unforgettable message and detect if it has been modified in transit: a digital signature is often used for this purpose—a magic number Docsity.com 6 Network/System Security Overview
Cryptography
Secret key cryptography
Modes of operation
Hashes and message digest
Public key cryptography
Some number theory, AES and elliptic curve cryptography
Authentication
How can Alice prove that she is Alice on networks?
Standards
Kerberos, PKI, IPSec, SSL
The underlying philosophy for these standards, that is, intuition behind various choices, design decisions, and flaws in these standards
Email security
Firewalls and secure systems Docsity.com 7 Two kinds of security
Computer security
Network security Docsity.com