Virus & Worms & Steganography 35- Ekta Nayak 36- Ankit Negi
Virus
Computer virus refers
to a program which
damages computer
systems and/or
destroys or erases
data files
Types of viruses
1)Boot Sector Viruses:-A boot sector virus is a
computer virus that infects a
storage device's master boot
record (MBR).
2)Program Viruses:-These infects executable program files such as those with extensions
like .BIN, .COM, .EXE
ated computer virus that affects data types and functions.
3)Multipartite viruses:-It infect the boot sector /MBR and also
infect program files.
4) Macro viruses:-It is a virus that infects the Microsoft word and other applications.
5)Polymorphic virusesA polymorphic virus is a complicated computer virus that affects data types and functions.
Worms
A computer worm is a
standalone
malware computer
program that
replicates itself in
order to spread to
other computers.
Steganography
STEGANOGRAPHY COMES FROM THE GREEK
WORD, IT MEANS COVERED OR SECRET
WRITING.
STEGAN-O-GRAPHY
COVERED + WRITING
Stagenography
The goal of stagenography is to hide a message.
This can be achieve by concealing the existence of information within
seemingly harmless carriers or cover.
It can be understand by the following figure.
Stagenography Under Different Media
Steganography in “Text”.
Steganography in “Images”.
Steganography in “Audio”.
Advantages.
Difficult to detect and only receiver can detect.
It can be done with large number of softwares.
Provides security for sharing data in LAN,MAN and WAN.
Disadvantages
The confidentiality is been achieved by using algorithm and if the algorithm
is known the its implementation is of no use.
Password leakage may occur.
If this technique goes in wrong hands then the result would be disasterous.