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To improve the security and the quality of decrypted and recovered images, this work proposes a classification permutation based separable reversible data hiding in encrypted image. A classification permutation encryption combining with the XOR-encryption is firstly designed to improve the privacy of both pixel-value and pixel-location. And then, each bit in the additional data is embedded in the...
In 2007, Wang-Chen proposed a majority-voting based self-recovery watermarking scheme, in which the additional authentication watermark of each block was embedded in the less significant bits and used to examine the authenticity of the same block. In this paper we examine the security of the Wang-Chen self-recovery watermarking scheme and show that it is vulnerable to the proposed XOR-equivalent attack...
In this paper, we propose a method for self-embedding an audio signal into itself as a means for protecting the content of audio signal. In the proposed algorithm, the host audio signal is divided into 4 segments, and the feature of every segment is embedded in the less significant bits (LSBs) of another segment that is randomly assigned based on the secret key. And the tamper detection can be performed...
This paper presents a new block-wise fragile watermarking scheme based on scramble encryption to improve security. In the proposed algorithm, the watermark derived from a block is not embedded in the least significant bit (LSB) of itself; rather, it is randomly distributed onto the LSB of whole host image by scramble encryption. In the verification stages, the predefined threshold is used to localize...
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