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These systems offer not only storage facility, but also high-end computing infrastructure which can be used to process data for various analysis tasks ranging from low-level data quality enhancement to high-level activity and behavior identification operations. However, cloud data centers, being third party servers, are often prone to information leakage, raising security and privacy concerns. In this article, we present a Shamir's secret sharing based method to enhance the quality of encrypted image data over cloud. Using the proposed method we show that several image enhancement operations such as noise removal, antialiasing, edge and contrast enhancement, and dehazing can be performed in encrypted domain with near-zero loss in accuracy and minimal computation and data overhead. Moreover, the proposed method is proven to be information theoretically secure.<\/jats:p>","DOI":"10.1145\/2656205","type":"journal-article","created":{"date-parts":[[2015,2,10]],"date-time":"2015-02-10T13:19:47Z","timestamp":1423574387000},"page":"1-24","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":47,"title":["Image Enhancement in Encrypted Domain over Cloud"],"prefix":"10.1145","volume":"11","author":[{"given":"Ankita","family":"Lathey","sequence":"first","affiliation":[{"name":"University of Winnipeg, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pradeep K.","family":"Atrey","sequence":"additional","affiliation":[{"name":"University of Winnipeg and State University of New York at Albany, Albany, NY"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2015,2,5]]},"reference":[{"key":"e_1_2_2_1_1","first-page":"2","article-title":"Recent advances in homomorphic encryption: A possible future for signal processing in the encrypted domain","volume":"30","author":"Aguilar M.","year":"2013","unstructured":"M. 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