PPCBIR: Privacy Preserving Content Based Image Retrieval

The amount of unstructured data such as images, videos being generated and shared everyday is growing at a faster rate. The storage need for such large amount of data is a driving factor for outsourcing services such as cloud storage and computing. However it actually raises new challenges in terms of data privacy. One solution is to encrypt the image database before outsourcing it and run all the computation on client side for eg, Earth Mover?s Distance or EMD-PPCBIR but this leads to client-overhead. To address this issue various technique has been developed for efficient retrieval of images such as IES-PPCBIR, EDH-PPCBIR, and SIFT PPCBIR, etc. Here CBIR servies are outsourced to the server side. All these method are effective over encrypted images.