Data Compression and Steganography Using Shift LSB Algorithm

Information Technology Engineering

Steganography is the method of writing hidden or secret messages in such a way that no attacker can suspect the existence of the secret message. Only the receiver can know that there exits some message related to him. Since Steganography is the Greek word, it means “Covered Writing”. Using this, one can transmit secret data in an insecure channel as it hides the message inside another message which can be text, audio, video or image. In this research work, in order to increase more security, along with steganography, data compression is used. Initially the secret data is being compressed using Huffman coding technique using the compression tools. Then the compressed data is stored in an image using Shift LSB (Least Significant Bit) Steganography technique. Since the message is compressed first, it reduces the size of file that is to be transmitted. Thus it increases security as well as the bandwidth is consumed less. And also the speed of transmission is faster and easier as the file used here of small size which contains the compressed image.

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