SEPARABLE REVERSIBLE DATA HIDING IN ENCRYPTED IMAGE


PROJECT GUIDE


ANEESH M HANEEF


GROUP MEMBERS 


ABDUL GAFOOR

AMAR C

DILSHEER ALI P

JAMSHID ALI M P


CONTENTS


  • INTRODUCTION

  • EXISTING SYSTEM

  • PROPOSED SYSTEM

  • IMPLEMENTATION

  • SCREENSHOTS

  • ARCHITECTURE DIAGRAM

  • CONCLUSION

  • REFERENCE

                                      

INTRODUCTION


         This work proposes a novel scheme for separable reversible data hiding in encrypted images. In the first phase, a content owner encrypts the original uncompressed image using an encryption key. Then the data-hider can hide data in the encrypted image by manipulating the LSB of the image pixel. With an encrypted image containing additional data, if a receiver has the data-hiding key, he can extract the additional data though he does not know the image content. If the receiver has the encryption key,he can decrypt the received data to obtain an image similar to the original one, but cannot extract the additional data. If he has both the key , he can extract the data and recover the original image.


EXISTING SYSTEM


  • The image is encrypted using a encryption key and the data is embedded using the same key.

  • The user who knows this key can access both the image and data.

  • The image can view only after removing the data.                              

PROPOSED SYSTEM


  • The image is encrypted using a encryption key and data is embedded using data hiding key.

  • Receiver can extract the data using data hiding key.                 

  • Receiver can decrypt the image using encryption key without removing the embedded data.

  • If the receiver has both the keys , he can access both the image and data.
IMPLEMENTATION

  • Image Encryption                                                         


  • Data-Hiding                                                                  


  • Image Decryption / Data Extraction                              

IMAGE ENCRYPTION


  • Read the pixels of image into a array.              


  • Generate key-stream using the RC4 algorithm.


  • XOR each pixel with the generated key-stream.

Original Image


Encrypted Image

DATA HIDING


  • Shuffle the encrypted pixel array using Fisher-Yates algorithm which uses a pseudo random number generator which is seeded by a data-hiding key.


  • Hide the data in the shuffled array by manipulating the LSB of each element.


  • Shuffle the array back to its original position using the Fisher-yates.
Encrypted Image
Encrypted Image with Data Hidden

IMAGE DECRYPTION / DATA EXTRACTION


Three cases can occur:-                                         

  • Receiver only have encryption key   

  • Receiver only have data-hiding key  

  • Receiver has both the keys              





Receiver only have the encryption key                                     


  • Read the image pixels into an array                                         


  • Generate the key-stream using the encryption key                    


  • XOR the key-stream with the pixel array and rebuild the original image                                                



Receiver only have the data-hiding key                                  


  • Read the image pixel into a array.                                             

  • Shuffle the array using Fisher-Yates according to the    data-hiding key.

  • Extract the LSB of the shuffled array.                                       


 Receiver have both keys                                                         


  • Read the pixel into an array.                                                  

  • Extract the data using data-hiding key.                                  

  • Decrypt the original image using the encryption key.             




SCREENSHOTS

                    Select the operation we want to perform


              Enter the details and press Encrypt for encryption



                Enter the keys and press decrypt for decryption 

(a)Original Image (b)Encrypted Image (c)Encrypted image with data embedded 
(d)Decrypted version of image
ARCHITECTURE DIAGRAM




CONCLUSION



                   In conclusion, using our proposed scheme we were able to encrypt an image using the encryption key and embed data into the image using data-hiding key. Both the image and the data can be retrieved separately. 

REFERENCE


  • Xinpeng Zhang- "Separable Reversible Data Hiding in Encrypted Image", IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY, VOL. 7, NO. 2, APRIL 2012
  • M. Johnson, P. Ishwar, V. M. Prabhakaran, D. Schonberg, and K.Ramchandran, “On compressing encrypted data,” IEEE Trans. Signal Process., vol. 52, no. 10, pp. 2992–3006, Oct. 2004.
  • W. Liu, W. Zeng, L. Dong, and Q. Yao, “Efficient compression of encrypted grayscale images,” IEEE Trans. Image Process., vol. 19, no. 4,pp. 1097–1102, Apr. 2010.
  • X. Zhang, “Lossy compression and iterative reconstruction for encrypted image,” IEEE Trans. Inform. Forensics Security, vol. 6, no. 1,pp. 53–58, Feb. 2011




Thank You

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