High Capacity Data Embedding Technique for Separable Encrypted Data Embedding in Encrypted Image

Abstract

Traditionally, if receiver has encrypted image containing data and he wants to output as extracted data or decrypted image then receiver needs both an image encryption key and a data-hiding key. Here data extraction is not separable from image decryption. If receiver has the data hiding key but not the image encryption key then he cannot extract any data from the encrypted image containing data. This work introduces a new system of separable an encrypted data embedding in an encrypted image. At sender side, a content owner encrypts an original image. A confidential data is encrypted using hybrid cryptography. Then, using BPCS steganography, the encrypted confidential data can be effectively embedded in the encrypted cover image. An encrypted image containing embedded encrypted data is sent to receiver. With an encrypted image containing embedded encrypted data, receiver will get output using this key or combination of keys. Keys are image encryption key, data encryption key, and data-hiding key.  Output may image, data or both depend on key/keys because of separable activity. A High capacity of confidential data embedding technique is achieved by using BPCS steganography