17-12-2012, 12:08 PM
MAKE IT STEGO
1STEGO[.pptx (Size: 614.25 KB / Downloads: 17)
Problem Statement
To protect any type of file; for example: image, data, video, audio, documentation by enforcing some constraints which will be only available to sender and receiver that will protect file from any malicious activity.
This can be done by using “Steganography”.
STEGANOGRAPHY
Steganography is the art and science of invisible
communication.
This is accomplished through hiding information in other information, thus hiding the existence of the communicated information.
The word steganography is derived from the Greek words “stegos” meaning “cover” and “grafia” meaning “writing” defining it as “covered writing”.
IMAGE STEGANOGRAPHY USING MOD-4
This the best available algorithm which provides “image steganography”.
It is used to improve the capacity of the hidden secret data and to provide an imperceptible stego image quality.
A group of 2×2 blocks of non-overlapping spatially adjacent pixels is selected as the valid block for embedding the secret message as shown in the figure below.
Applications
Encrypting important data of IT industries.
Individuals may share working space with each other in network ,with prevention from external attacks(intruders)