A microcomputer is easy to keep secure. Measures may
include...
locking the computer room / alarms
locking the computer
password
When a number of computers are linked (eg multi-access, network or
Internet) the security is harder to
maintain.
A hacker is a person who gains
unauthorised access to a computer over a network.
Security measures may include...
each user should be given a user name and a
password.
computer usage may be logged.
computers should be disconnected from a
network when not in use.
call-back system. When a remote user
logs in to a computer, the connection is immediately broken and the
computer dials up the user's telephone number.
use a firewall - a computer running software which detects
hackers dialing in to a network.
Exercise
: System Security
Someone who gains unauthorised access to a
computer over a network is called a .
Measures to prevent hackers include
each user of a system has to log in with a user name and
the computer keeps a of all its users
computers should be when not in use.
a call-back system may dial back each user when they .
