SEPARABLE REVERSIBLE DATA HIDING IN ENCRYPTED IMAGE

OBJECTIVE:

The objective of this project is to provide an efficient data hiding

technique and image Encryption in which the data and the image can be

retrieved independently.

PROBLEM DIFINITION:

The problem found in our existing system as, the secret key used for

encryption of compressed image and the data hiding is same. So, the user who

knows the secret key used for encryption can access the data embedded and the

original data. The original Image can be retrieved from the encrypted image

after extracting or removing the data hidden in the image. The content owner

and the data hider share the same encryption key for the encryption of the Image

and data hiding.

ABSTRACT:

The use of computer networks for data transmissions has created

the need of security. Many robust message encryption techniques have been

developed to supply this demand. The amount of digital images has increased

rapidly on the Internet. Image security becomes increasingly important for

many applications, e.g., confidential transmission, video surveillance, military

and medical applications. Nowadays, the transmission of images is a daily

routine and it is necessary to find an efficient way to transmit them over

networks.

To decrease the transmission time, the data compression is necessary. The

protection of this multimedia data can be done with encryption or data hiding

algorithms. Since few years, a problem is to try to combine compression,

encryption and data hiding in a single step. For example, some solutions was

proposed in3 to combine image encryption and compression. Two main groups

of technologies have been developed for this purpose.

The first one is based on content protection through encryption. There are

several methods to encrypt binary images or gray level images. In this group

proper decryption of data requires a key. The second group bases the protection

on digital watermarking or data hiding, aimed at secretly embedding a message

into the data. Encryption and watermarking algorithms rely on the Kirchhoff’s

principle: all the details of the algorithm are known, and only the key to encrypt

and decrypt the data should be secret.

EXISTING SYSTEM:

In the existing system reversible data hiding technique the

image is compressed and encrypted by using the encryption key and the data to

hide is embedded in to the image by using the same encryption key. The user

who knows the secret encryption key used can access the image and decrypt it

after extracting or removing the data hidden in the image. After extracting the

data hidden in the image then only can be the original image is retrieved.

DISADVANTAGES:

The secret key used for encryption of compressed image and the data

hiding is same. So, the user who knows the secret key used for encryption

can access the data embedded and the original data.

The original Image can be retrieved from the encrypted image after

extracting or removing the data hidden in the image.

The content owner and the data hider share the same encryption key for

the encryption of the Image and data hiding.

PROPOSED SYSTEM:

In proposed method the image is encrypted by content

owner by using the encryption key. The data hider can hide the data in the

encrypted image compressing the least significant bits of the encrypted image to

obtain the space to hide the data by using data hiding key. At the receiver side

the data can be retrieved using the data hiding key by decrypting the image. But,

the encrypted image unchanged still it is decrypted using the encryption key.

The receiver who has the both the encryption and data hiding keys can access

the data embedded as well as the original image.

ADVANTAGES:

The data hiding and image encryption are done by using two different

keys. That is encryption key and the data hiding key.

The receiver who has the data hiding key can retrieve the data

embedded.

The receiver who has the encryption key can retrieve the original

image without removing or extracting the data embedded in the

encrypted image.

The receiver who has the both the keys can retrieve the data hidden

and the original image from the encrypted image.

ALGORITHM USED:

1. LSB (Least Significant Bit)

2. DES (Data Encryption Standard)

ARCHITECTURE DIAGRAM:

SYSTEM REQUIREMENTS:

Hardware Requirements:

Intel Pentium IV

256/512 MB RAM

1 GB Free disk space or greater

1 GB on Boot Drive

1 Network Interface Card (NIC)

GSM

Software Requirements:

MS Windows XP/2000

MS IE Browser 6.0/later

MS .Net Framework 2.0

MS Visual Studio.Net 2005

Internet Information Server (IIS)

MS SQL Server 2000

Windows Installer 3.1

APPLICATIONS:

1. Deductive Agencies

2. Consultancies

3. Bank Information Sharing’s