期刊名称：International Journal of Communication and Computer Technologies
印刷版ISSN：2278-9723
出版年度：2014
卷号：2
期号：1
出版社：IJCCTS
摘要：Due to rapid development in the network and communication field, it has become necessary to protect the unauthorized duplication of a confidential image. Conventional methods having information loss during recovery, it will be easily hacked, lower embedding capacity, requires more memory and power consumption. The proposed scheme offers an effective protection, data embedding along with high security. Curvelet transform used to overlay visible watermark on colour image. For transferring confidential data, content owner encrypts the original uncompressed colour image using an encryption key. Then image-hider compress the LSB of all three planes of encrypted colour image using a image-hiding key. With an encrypted image containing secret image, if a receiver has the image-hiding key will extract the secret images and the receiver has the encryption key will decrypt the received data to obtain an original image. In order to extract secret image and to recover the original content simultaneously both image hiding key and encryption key are necessary. Randomization in encryption key generation is improved by parallel RC4 algorithm. Hidden image security will be increased by odd and even shuffling of secret image bits within compressed encrypted colour image. It has good embedding capacity and better quality recovered image.
