Data Hiding in Colored Encrypted Images
Karattupalayam Chidambaram Saranya · 2014
Encryption plays a vital role in the domain of data security. Information retrieval from hidden content or encrypted data is an interesting task. That too the information has to be extracted to a plain environment where it can be utilized efficiently. RDH formula is used to reserve space for data which is used to attach additional data so it becomes easy for the users. Proposed system also extracts data from encrypted form without any error. Thereby hider and receiver can do their activities easily. Idea proposed will be with appreciable capacity of assuring secrecy. Real changeableness, information extraction and improvement on marked decrypted Images are features of novel method. To achieve image quality ten times as massive payloads are used while performing experiments based on this algorithm. Block smoothness can be used to perform data extraction and image recovery. When encrypting the complete information of associate uncompressed image by a stream cipher, the extra information may be embedded into the image by modifying tiny low proportion of encrypted information. With associate encrypted image containing extra information, one could first decode it victimization the cryptography key, and therefore the decrypted version is analogous to the initial image per the data-hiding key, with the help of spatial correlation in natural image, the embedded information may be with success extracted and therefore the original image may be absolutely recovered. Index Terms—Advanced encryption standard, color histogram, least significant bit, Reversible Data Hiding