Journal of Applied Sciences ›› 2015, Vol. 33 ›› Issue (1): 50-58.doi: 10.3969/j.issn.0255-8297.2015.01.006

• Signal and Information Processing • Previous Articles     Next Articles

Reversible Data Hiding in Encrypted Images Transmitted on Demand

  

  1. School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China
  • Received:2014-10-17 Revised:2014-12-02 Online:2015-01-30 Published:2014-12-04

Abstract: This paper proposes a new method of reversible data hiding in encrypted images. The sender down-samples the original image and calculates the residuals to generate two sets of objects: sub-images and residuals. These are encrypted with an encryption keyand sent to the server. The server applies arithmetic coding on the encrypted residuals to generate spatial redundancy, and then hides extra data using the embedding key. With the key, the receiver obtains different versions of the data transmitted by the server. Unlike the conventional methods, a transmission-on-demand mechanism is used, which can effectively reduce the amount of transmitted data on the server. With the image perfectly recovered, the data embedding rate is greatly improved.

Key words:  reversible data hiding, encryption, data hiding, arithmetic coding

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