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Binary image Steganography in wavelet domain

In today’s era sharing of secret data over internet has increased widely. Along with increase in frequent information sharing on Internet threat of malicious access also pulls significant attraction. Cryptography and Steganography are solution to this problem. Steganography is a technique to make private or secret data invisible to the world in order to send it over the network securely. In this paper we proposed an algorithm which is in transform domain and simple in calculation. To increase the level of security we encrypt the data before embedding it into the carrier file.

We perform discrete wavelet transform on cover image followed by fusion. At last we perform inverse wavelet transform to get stego image. We compare original cover image and stego image; the results we obtained are good as both the images are almost identical. This is proved by high PSNR (Peak Signal to Noise Ratio) values we have obtained.

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