Separable Encrypted Data Embedding in Encrypted Image with Large Data Embedding Capacity
Keywords:
BPCS (Bit Plane Complexity Segmentation), Data Embedding, Hybrid cryptography, Image recoveryAbstract
This paper proposes a novel scheme of separable encrypted data embedding in encrypted image with large data embedding capacity. An image encrypts using cryptography algorithm and secret data encrypts using hybrid cryptography. Then, the encrypted secret data can be successfully embedded in the encrypted cover image using Modified BPCS steganography. An encrypted image containing encrypted data is sent. At the receiver side, with an encrypted image containing embedded encrypted data, if a receiver has the data hiding key and data encryption key then he is only able to extract the encrypted and encrypted data is decrypted by data encryption key. If the receiver has an image encryption key then he can decrypt the image and get an image similar to the original one. If the receiver has the image encryption key also data-hiding key then he is able to recover the original image but extract the encrypted data. If the receiver has the image encryption key, data hiding key, and data encryption key then he can recovered the image and extract the encrypted data after that encrypted data is decrypted to obtain a data similar to original data without any error. Separation activity is achieved according to available key/keys. A large data can embed data by using Modified BPCS steganography.
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