Virus detection
and its removal are mode through an antivirus or with some other
security program. Different antivirus programs are available in the
market and over Internet. The most common and famous security technique
against viruses is as under:
Virus Signature/ Virus Definition
Virus
signature is a known pattern of code of a code of a virus program; this
pattern is used by antivirus program to detect viruses and then to
remove these viruses. You should update virus definition continuously by
downloading updates from Internet. This ensures that your antivirus is
always able to detect changing viruses.
Inoculation
Inoculation
file is separate file created and maintained by antivirus program to
record information like file size and file creation date. This
information later on is used for virus detection and removal.
Quarantine
Quarantine
is a separate area on a hard disk. It contains the infected files and
folders that cannot be cleared or deleted by antivirus due to some
reason, for example sharing violation or unknown virus for that
antivirus.
Recovery Disk
Recovery disk
is a removable disk that holds un-infected system commands and startup
information. In case the boot record of actual hard disk fails, this
recovery disk can be used to start the computer. Afterwards an antivirus
program can be used to remove the virus.
Un-authorized access
Accessing
a computer system without the knowledge or permission of its user is
called unauthorized access. It is always recommended to restrict
computer resources with the help of usernames and passwords. These are
unique combination of characters to identify users and their secret
codes respectively.
Firewall
Firewall is
a security system consisting of hardware and software to prevent
unauthorized access of a network or computer. Big companies use a
separate computer firewall software or hardware to protect their date
from unauthorized access. Firewall check outgoing and incoming traffic
and manage data access to the authorized users only.
Biometric Devices
A
biometric device reads personal characteristics like fingerprints hand
structure, facial features, and voice recognition to authenticate a user
for any further access to a computer system or other peripheral
devices. A biometric device translates the personal characteristics into
digital code that is matched to already store user data in that system.
If the digital data matches with any of the stored data, it gives
access to the person. In case of no match, the access is denied.
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