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To improve the embedding capacity and provide an imperceptible visual quality, a novel steganographic method based on four-pixel differencing and modified least significant bit (LSB) substitution is presented. The average difference value of a four-pixel block is exploited to classify the block as a smooth area or an edge area. Secret data are hidden into each pixel by the k-bit modified LSB substitution...
The original Adaptive-Edge method proposed by Yang et al. is a novel adaptive least significant bit steganographic method that provides a larger embedding capacity and imperceptible stego images. In this paper, we propose an improved version of Adaptive-Edge method by changing the readjusting phase. The original readjusting phase is just executed for the pixel pairs whose difference values belong...
In this paper, we address the “multi-party covert communication”, a stronger notion of security than standard secure multi-party communication. Multi-party covert communication guarantees that the process of it cannot be observed. We propose a scheme for steganographic communication based on a channel hidden within quantum secret sharing (QSS). According to our knowledge nobody has ever raised the...
In this paper, we present three embedding schemes for extensions of least significant bit overwriting to both of the two lowest bit planes in digital images. Our approaches are inspired by the work of Fridrich et al. (2005) who proposed wet paper coding as an efficient method for steganographic schemes. Our new works generalize it to the embedding in two least significant bits, that is to say, combine...
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