steganography system uses two algorithms, one for embedding and one for extraction. The embedding process hides a secret message within a cover image/video. The result of embedding process is called stego image. The main advantage is that the secret message will not be accessed if a third party tries to intercept the cover media.

1. Steganography...
Narayan Lal Menariya
Purpose – Data Security
Data Security- data security simply means that preventing the
access of data from unauthorised users and transfer it safely to
the required destination.
cryptography and steganography can be used to provide data
security.
In Greek kryptos stands for secure and Stegnos stands for
protected and graphein(graphy) stands for writing .
We have used the Steganography method for our project in
order to transmit data safely .
Steganography - steganography system uses two algorithms,
one for embedding and one for extraction. The embedding
process hides a secret message within a cover image/video.
The result of embedding process is called stego image.
The main advantage is that the secret message will not be
accessed if a third party tries to intercept the cover media .
The extraction process is simple because it is the inverse of the
embedding process, where the secret message is revealed at
the end.
Algorithm – At initial level we have embedded a text message
inside a 2D image and extract it .
After that we embedded a 2D image inside a 3D image and
extract it again from that.

2. Further we took a video ,extract a frame and embedd a 2D
image inside that frame .
In extracting part we accessed the same frame from the
modified video and obtain the inserted 2D image.
1. Inserting a message inside 2D image:
 Read a 2D image cameraman.tif
 Convert it into decimal and then into binary.
 Convert the message string into ASCII and then into
binary.
 Replace the LSB bit of 2D image pixels by all the binary
values of string message. By following the reverse
process extract the original message.
2D Image
Decimal Equivalent
Binary Equivalent
Text Message
Binary equivalentEmbedding
Stego image Extraction Extracted Message

3. 2.Inserting 2D image inside 3D image:
 Read 2D image cameraman.tif and convert it into first
decimal and then into binary.
 Read 3D image peppers.png and accessed the red, green
and blue page.
 Convert all three page into binary.
 Replace first LSB bit of red page pixels with third bit of 2D
image pixel.
 Replace first two LSB bit of green page pixels with 4th and
5th
bit of 2D image.Now finally replace first 3 bit of blue
page pixels with remaining 6th
,7th
and 8th
bit of 2D image.
 Follow the reverse process to get cameraman image.
3D Image
Decimal equi.
2D ImageRed Green Blue
Decimal equi. Decimal equi.
Binary equi. Binary equi. Binary equi.
Decimal equi.
Binary equi.Embedding
Stego image Extraction 2D Image

4. 3.Inserting 2D image inside video :
 Read all the frames from video.
 Each frame itself is a 3D image.
 Do the same process as done above.
 Create a new video using that stego image.
Video Frame
Red Green Blue
Decimal equi. Decimal equi. Decimal equi.
Binary equi. Binary equi. Binary equi.
Video
2D Image
Decimal equi.
Binary equi.Embedding
Stego image
Modified Video
Video Frame Extraction 2D Image

5.  To get back the 2D image read all the frames
of video .
 Follow reverse process of inserting.