Abstract
Images are used as the popular cover objects for steganography. A message is embedded in a digital image through an embedding algorithm, using the secret key. In this process image is divided into different regions for the detection of least significant bits available in different images. The no. of bits that can be utilized for image enhancement depend upon the pixel intensity the low intensity pixel utilizes less no. of bits and pixel having a high intensity utilized maximum bits in the process of hiding the image. The issue in this is security for prevention image from stegnalysis attack and the secret data is available in such a manner as it transmitted.in this paper a review on various approaches have been done that has been used for embedding of secret information behind the cover object.
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