Chapter 13 Understanding E-Security - PowerPoint PPT Presentation

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Chapter 13 Understanding E-Security

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Chapter 13 Understanding E-Security OBJECTIVES What are security concerns (examples)? What are two types of threats (client/server) Virus Computer Enemy #1 threat ... – PowerPoint PPT presentation

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Title: Chapter 13 Understanding E-Security


1
Chapter 13Understanding E-Security
2
OBJECTIVES
  • What are security concerns (examples)?
  • What are two types of threats (client/server)
  • Virus Computer Enemy 1 threat
  • How to prevent and protect?

3
SECURITY CONCERNS examples
  • Uncover confidentiality (bank account)
  • Leak Authentication and Access Control (user
    name, password of your Web, email)
  • Conduct ID theft (over 50 is credit card fraud)
  • Hack or Intrude Web sites

4
CLIENT SECURITY THREATS
  • Happens to client computers
  • examples
  • Deliberate Corruption of Files (e.g., rename
    files)
  • Delete Stored Information
  • Use Virus (bring down system)

5
SERVER SECURIY THREATS
  • Web server with active ports (e.g., 80, 8080) can
    be misused (scalability or deny of service
    attack)
  • Web server directories (folders) can be accessed
    and corrupted

6
Server Threats DENIAL OF SERVICE
  • Hackers
  • Break into less-secured computers
  • Installs stealth program which duplicates itself
    (congest network traffic)
  • Target network from a remote location (RPC) and
    activates the planted program
  • Victims network is overwhelmed and other users
    are denied access to Web and Email

7
VIRUS eCommerce Threat 1
  • A malicious code replicating itself to cause
    disruption of the information infrastructure
  • Attacks system integrity (cause inconsistent
    data)
  • Target at computer networks, files and other
    executable objects

8
EXAMPLES OF VIRUSES
  • Windows registry (regedit, cookies) e.g.,
    spyware and adware (one type of spyware)
  • Boot Virus
  • Attacks boot sectors of the hard drive
  • Trojan horses a bot
  • planted in the systems being attacked, can be
    operated locally or remotely for malicious
    purposes

9
EXAMPLES OF VIRUSES (cont.) Trojan horse
10
VIRUS CHARACTERISTICS
  • Fast to attack
  • Easily invade and infect computer hard disk
  • Slow to defend
  • Less likely to detect and destroy
  • Hard to find (Stealth)
  • Memory resident (registry)
  • Able to manipulate its execution to disguise its
    presence

11
BASIC INTERNET SECURITY TIPS
  • Use Password
  • Alphanumeric
  • Mix with upper and lower cases
  • Change frequently
  • No dictionary names
  • Use Encryption
  • Coding of messages in traffic between the
    customer placing an order and the merchants
    network processing the order

12
FIREWALL SECURITY
  • Firewall frequently used for Internet security -
    prevent
  • Enforces an access control policy between two
    networks
  • Detects intruders, blocks them from entry, keeps
    track what they did and notifies the system
    administrator

13
Other security approach- repair, e.g.
AntiSpyware to clean virus
14
Summary and Exercises
  • Name a few security concerns
  • What are the two types of threats?
    (client/server)
  • Explain Trojan Horse Virus
  • How to prevent and repair?
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