Abstract
The advancements in the area of Signal processing in encrypted domain aka s.p.e.d are extremely useful for cloud computing and other distributed storage applications. Even though cloud computing provides solution for storage and processing of bulk data, it raises severe security concerns, especially when the data contain sensitive personal information. This necessitates the need for devising methods for processing the data in encrypted domain. Image processing techniques in encrypted domain either suffer from complex data processing operations or restricted distribution requirements. This paper attempts to resolve security issues in distribution of computationally efficient Shamir's secret sharing scheme. Also, two important image processing operations viz., image interpolation and 2D DCT are implemented in encrypted domain over cloud. Analysis show that quality of the processing operations is at par with that of the corresponding operations in plain domain
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