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It is challenging to satisfy both (personal) privacy and authenticity of a video simultaneously, since the privacy requires modifications (e.g., partial deletions) of an original video image while the authenticity does not allow any modifications of the original image. This paper proposes a novel method to convert an encryption scheme to support partial decryption with a constant number of keys and construct a privacy-aware authentication scheme by combining with a signature scheme. The security of our proposed scheme is implied by the security of the underlying encryption and signature schemes. Experimental results show that the proposed scheme can handle the UHD video stream with more than 17 fps on a real embedded system, which validates the practicality of the proposed scheme.<\/jats:p>","DOI":"10.1145\/3358195","type":"journal-article","created":{"date-parts":[[2019,10,10]],"date-time":"2019-10-10T13:13:05Z","timestamp":1570713185000},"page":"1-17","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":3,"title":["AuthCropper"],"prefix":"10.1145","volume":"18","author":[{"given":"Jihye","family":"Kim","sequence":"first","affiliation":[{"name":"Kookmin University, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiwon","family":"Lee","sequence":"additional","affiliation":[{"name":"Hanyang University, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hankyung","family":"Ko","sequence":"additional","affiliation":[{"name":"Hanyang University, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Donghwan","family":"Oh","sequence":"additional","affiliation":[{"name":"Hanyang University, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Semin","family":"Han","sequence":"additional","affiliation":[{"name":"Hanyang University, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gwonho","family":"Jeong","sequence":"additional","affiliation":[{"name":"Hanyang University, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hyunok","family":"Oh","sequence":"additional","affiliation":[{"name":"Hanyang University, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"320","published-online":{"date-parts":[[2019,10,8]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"crossref","unstructured":"Michel Abdalla and Leonid Reyzin. 2000. 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In Advances in Cryptology - CRYPTO\u201999, 19th Annual International Cryptology Conference, Santa Barbara, California, USA, August 15\u201319, 1999, Proceedings. 431--448. DOI:https:\/\/doi.org\/10.1007\/3-540-48405-1_28"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1145\/2090236.2090263"},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.5555\/1894302.1894310"},{"key":"e_1_2_1_6_1","unstructured":"Nicola Cutcher. 2010. CCTV and police abuse of power. https:\/\/www.theguardian.com\/commentisfree\/2010\/jul\/19\/gaza-protests-inquiry-police-cctv.  Nicola Cutcher. 2010. CCTV and police abuse of power. https:\/\/www.theguardian.com\/commentisfree\/2010\/jul\/19\/gaza-protests-inquiry-police-cctv."},{"key":"e_1_2_1_7_1","volume-title":"Proceedings. 332--354","author":"Itkis Gene","year":"2001","unstructured":"Gene Itkis and Leonid Reyzin . 2001 . Forward-secure signatures with optimal signing and verifying. 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