Steganography is an art of transfer hidden data or secret messages over a public channel so that ... more Steganography is an art of transfer hidden data or secret messages over a public channel so that a third party cannot detect the presence of the secret messages. In the recent years, there are lots of systems are introduced. The people invented a huge thing to protect the data and there are lots of hidings techniques are to be invented for security purpose. But that techniques can be hacked by unauthorized users is drawback in existing systems so a new system proposed information hiding behind the video using forbidden zone and selective embedding. This system makes use of correction ability of copying store codes and advantage of forbidden zone data hiding is used. This system is tested by all types of videos that type of video which help to data hiding like avi , mp4 etc. In this study the encryption and decryption techniques used to security key. Without that key no one can see the unique data. This technique is used to secure the database from illegal and the destructive forces. It has large erasure capability of data hiding.
In matrix embedding (ME) based steganography, the host coefficients are minimally perturbed such ... more In matrix embedding (ME) based steganography, the host coefficients are minimally perturbed such that the transmitted bits fall in a coset of a linear code, with the syndrome conveying the hidden bits. The corresponding embedding distortion and vulnerability to steganalysis are significantly less than that of conventional quantization index modulation (QIM) based hiding. However, ME is less robust to attacks, with a single host bit error leading to multiple decoding errors for the hidden bits. In this paper, we employ the ME-RA scheme, a combination of ME-based hiding with powerful repeat accumulate (RA) codes for error correction, to address this problem. A key contribution of this paper is to compute log likelihood ratios (LLRs) for RA decoding, taking into account the many-to-one mapping between the host coefficients and an encoded bit, for ME. To reduce detectability, we hide in randomized blocks, as in the recently proposed Yet Another Steganographic Scheme (YASS), replacing the QIM-based embedding in YASS by the proposed ME-RA scheme. We also show that the embedding performance can be improved by employing punctured RA codes. Through experiments based on a couple of thousand images, we show that for the same embedded data-rate and a moderate attack level, the proposed ME-based method results in a lower detection rate than that obtained for QIM-based YASS.
Steganography is an art of transfer hidden data or secret messages over a public channel so that ... more Steganography is an art of transfer hidden data or secret messages over a public channel so that a third party cannot detect the presence of the secret messages. In the recent years, there are lots of systems are introduced. The people invented a huge thing to protect the data and there are lots of hidings techniques are to be invented for security purpose. But that techniques can be hacked by unauthorized users is drawback in existing systems so a new system proposed information hiding behind the video using forbidden zone and selective embedding. This system makes use of correction ability of copying store codes and advantage of forbidden zone data hiding is used. This system is tested by all types of videos that type of video which help to data hiding like avi , mp4 etc. In this study the encryption and decryption techniques used to security key. Without that key no one can see the unique data. This technique is used to secure the database from illegal and the destructive forces. It has large erasure capability of data hiding.
In matrix embedding (ME) based steganography, the host coefficients are minimally perturbed such ... more In matrix embedding (ME) based steganography, the host coefficients are minimally perturbed such that the transmitted bits fall in a coset of a linear code, with the syndrome conveying the hidden bits. The corresponding embedding distortion and vulnerability to steganalysis are significantly less than that of conventional quantization index modulation (QIM) based hiding. However, ME is less robust to attacks, with a single host bit error leading to multiple decoding errors for the hidden bits. In this paper, we employ the ME-RA scheme, a combination of ME-based hiding with powerful repeat accumulate (RA) codes for error correction, to address this problem. A key contribution of this paper is to compute log likelihood ratios (LLRs) for RA decoding, taking into account the many-to-one mapping between the host coefficients and an encoded bit, for ME. To reduce detectability, we hide in randomized blocks, as in the recently proposed Yet Another Steganographic Scheme (YASS), replacing the QIM-based embedding in YASS by the proposed ME-RA scheme. We also show that the embedding performance can be improved by employing punctured RA codes. Through experiments based on a couple of thousand images, we show that for the same embedded data-rate and a moderate attack level, the proposed ME-based method results in a lower detection rate than that obtained for QIM-based YASS.
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