Virus & Worms & Steganography

35- Ekta Nayak36- 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.

Worlds worst virus and worm attacks

➢Morris worm

➢ Code red

➢MSBlast

➢ Storm worm

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.

Block Diagram of Stagenography

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.

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