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Image steganography is the art of hiding information into the cover image in such a way that no one; apart from the sender and intended recipient even understand there is hidden message. In this paper, a novel steganography technique mainly based on Joint Photographic Expert Group (JPEG) is proposed. This technique is based on 2-D Block-DCT, where DCT is used to transform original image (cover image) blocks from spatial domain to frequency domain. With the development of Internet technologies, digital media can be transmitted conveniently over the Internet.
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