Image Steganography Research Paper

Image Steganography Techniques – A Survey

Roshni B. Solanki

PG student,Computer Engineering

Sarvajanik College of Engineering Technology

Surat, India [e-mail] Abstract— In today’s era, due to advancements in the field of information technology, the need for information security is highly increasing day by day. Steganography plays a major role in secret data communication. It is nothing but to communicate in such a way that not only the contents are hidden but also the existence of message is kept secret which makes it different from cryptography which concerns only with keeping the contents secret. Steganography can be accomplished by hiding the information in other information, and for that, many different carrier file

The security of our data has always been a prominent issue. Our secret data needs to be so secure and safe so that it can only access by the authorized person. The amount of data sharing on the internet from one place to another is increasing day by day and that amount is beyond our imagination. So with rising of data sharing, the need for security of data is also increased. Steganography plays a major role in secret data communication. It is nothing but to communicate in such a way that not only the contents are hidden but also the existence of message is kept secret which makes it different from cryptography which concerns only with keeping the contents secret. Steganography and cryptography they both have the same purpose that is, to provide security to our data. But, they have a different approach. Steganography deals with making the data unseen and cryptography deals with making the data unreadable. So finally,we can say that the cryptography deals with the privacy of data and steganography deals with the secrecy of data. However, steganography method is not intended to substitute or replace the cryptography method but rather to complement cryptography. What if we combine both? We can provide more security to our data, right?. So, using cryptography along with the steganography provides more security to our data, that

Steganography mainly aims to hide the data in a cover medium so that no one can suspect the existence of secret information which is hidden behind it. For this purpose, many different carrier file formats are used such as audio, video, text, and image. The most popular carrier for steganography is the image because of their frequency on the internet, so hiding the data behind image file is known as image steganography. Secret data hiding in digital images has drawn much attention in recent years.

II. RELATED WORK

Different algorithms of image steganography are :

a) Dynamic Approach of Frequency Based Image Steganography : uses image compression and it is based on transform domain. Advantage is that the process of data hiding is done by randoming approach. Limitation is that it has high MSE and stego image quality is minor changed after embedding.

b) Skip position approach : It is a spatial domain technique that deals with MSB, LSB and middle bit. Advantages are high payload capacity, security and the process of data hiding is done by randoming