[Intermernet]

Interesting paper: Bypassing Cloud Providers’ Data Validation to Store Arbitrary Data [1]

>JPG & PNG Steganography Encoder (JPG-PNGStega). The purpose of this encoder is to inject data (hiding it) in JPG and PNG files. It takes a File Format Sample (JPG or PNG) and, for each pixel, it injects 3 bits of data in the LSBs (Least Significant Bit). There are more sophisticated image steganography methods already widely discussed. However, the use of this encoder shows that even basic meth- ods of JPG and PNG steganography are possible in SaaS applications, and the exploitation of such method may bring impacts

http://arxiv.org/ftp/arxiv/papers/1404/1404.2637.pdf