Degradation and encryption for outsourced PNG images in cloud storage

Wang, Ying, Du, Jiali, Cheng, Xiaochun ORCID logoORCID:, Liu, Zheli and Lin, Kai (2016) Degradation and encryption for outsourced PNG images in cloud storage. International Journal of Grid and Utility Computing, 7 (1) . pp. 22-28. ISSN 1741-847X [Article] (doi:10.1504/IJGUC.2016.073773)


In cloud storage environment, users frequently store images and retrieve them by personal device, including mobile phones. However, the content of outsourced images will be leaked to the cloud server, which is not trusted by users. To protect the privacy of sensitive images, this paper proposes format-compliant degradation and encryption method for Portable Network Graphics (PNG). More specifically, for PNG degradation, improved prefix method and noise generation methods are developed. Furthermore, for PNG encryption, a modified generalised-Feistel method is developed. Finally, our security analysis demonstrates that the proposed scheme is secure. Our experiment results also show that the scheme is efficient and practical.

Item Type: Article
Research Areas: A. > School of Science and Technology > Computer Science
Item ID: 24582
Useful Links:
Depositing User: Xiaochun Cheng
Date Deposited: 09 Jul 2018 18:14
Last Modified: 30 Oct 2019 21:04

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