Abstract
Steganography is the science of invisible communication. Apart from the sender and intended recipient no one suspects the existence of the message. Using Steganography, information can be hidden in various mediums known as carriers. The carriers can be images, audio files, video files and text files. Image Steganography is a technique of using an image file as a carrier. Cryptography protects the information by applying the encryption and decryption techniques, so that the secret message can be understood only by the right person.This paper proposes a method, which combines the techniques of Steganography and cryptography, to hide the secret data in an image. In the first phase, the sender will embed the secret data in an image by using the Least Significant Bit (LSB) technique. The embedded image will be encrypted by using an encryption algorithm. At final, the encrypted image will be decrypted and the hidden data will be retrieved by supplying the valid secret key by the receiver. The process includes the phases of Data embedding, Image Encryption and recovery of both original image and secret data from the encrypted image.
Highlights
Internet is one of the most important factors of communication and information technology, providing the security can be achieved through the techniques of Steganography and Cryptography
This paper proposes a method, which combines the techniques of Steganography and cryptography, to hide the secret data in an image
A specific secret-key image based data hiding model has been proposed which uses an image as the cover object and secret information is embedded into the cover image to form the stego image
Summary
Internet is one of the most important factors of communication and information technology, providing the security can be achieved through the techniques of Steganography and Cryptography. The purpose of Steganography fails if the presence of hidden information is revealed or even suspected. Cryptography is another technique for securing the secret information. The work proposed in this paper is the combination of both Steganography and cryptography. It shows how effectively the information can be transferred between two parties without security lapse. The terminologies used in Steganography are cover-image, Stego-image, secret message, secret key and embedding algorithm. Cover-image is the carrier of the message such as image, video or audio file. The embedding algorithm is the way, which is used to embed the secret information in the cover image
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