This document defines and compares viruses, worms, and Trojan horses. It also discusses firewalls, antivirus software, and physical security measures. Without proper security, attackers can intercept login information submitted by users to servers and steal the users' data, as intercepted login pages allow attackers to see submitted login details.

5. Virus
Worm
Trojan horse

6. A virus is a program
that propagates itself
by infecting other
programs on the
computer

7. Worm spreads itself
automatically over the network
from one computer to the next.

8. Trojan horse is a program that
claims to rid your computer of
viruses but instead introduces
viruses onto your compute

9.  Firewall system
 Anti virus
 Physical security

10. A firewall is a network security
system that monitors and controls
the incoming and outgoing
network

11. Antivirus is a software application
used for the prevention, detection,
and removal of computer virus

13. Without Security
user Attacker

14. User requests login page
Bank sends
login page
Attacker
User intercepts
and adds fields
When user submits
information
It can also seen by attacker
The attacker can then
use the information to
log in to the user’s bank
User Bank server

17. By
G. Pavan PrasadSITAMS