Details

Autor(en) / Beteiligte

• Xiao, Di
• Xiang, Yanping
• Zheng, Hongying
• Wang, Yong

Titel

Separable reversible data hiding in encrypted image based on pixel value ordering and additive homomorphism

Ist Teil von

• Journal of visual communication and image representation, 2017-05, Vol.45, p.1-10

Ort / Verlag

Elsevier Inc

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •Real reversibility is realized; that is to say, data extraction and image recovery are free of any error.•Data embedding is processed in the encrypted domain.•There is no data expansion.•The performance of the proposed method is satisfactory. This work proposes a separable reversible data hiding scheme in encrypted images based on pixel value ordering (PVO). After the original image is encrypted using homomorphism encryption by the content owner, the data hider embeds the secret data in encrypted domain. The PVO strategy realizes hiding data in each block. Additive homomorphism guarantees the performance of PVO in encrypted domain is close to that in plain domain. Besides, the homomorphism encryption does not cause data expansion, and the payload can be further improved. With the watermarked encrypted image, if the receiver has only the data hiding key, he can extract the additional data. If the receiver has only the encryption key, he can obtain a decrypted image similar to the original one. If the receiver has both the data hiding key and the encryption key, he can extract the additional data without any error and recover the original image losslessly.