A novel hash function based fragile watermarking method for image integrity

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dc.contributor.authorGul E.
dc.contributor.authorOzturk S.
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2019
dc.departmentNiğde ÖHÜ
dc.description.abstractIn recent years, tampering and altering of digital images have become easier with the rapid development of computer technologies such as digital image editing tools. Therefore, verification of image integrity and tamper detection of digital images have become a great challenge. Fragile watermarking is the most widely used method for protecting the integrity and content authenticity of the image. In this paper, by using SHA-256 hash function, a novel block based fragile watermark embedding and tamper detection method is proposed. In watermark embedding phase, host image is divided into 32 × 32 non-overlapped blocks. Each 32 × 32 block is then divided into four 16 × 16 nonoverlapped sub-blocks. The entire hash value of the first three sub-blocks is generated as a watermark using SHA-256 hash function. The generated 256-bit binary watermark is embedded into the least significant bits (LSBs) of the fourth sub-block and watermarked image is obtained. In tamper detection phase, the detection of tampered block has been performed by comparing the hash value obtained from the three sub-blocks with the extracted watermark from the fourth sub-block of the watermarked image. The performance of the proposed method has been evaluated by applying linear and nonlinear attacks to the different regions of the watermarked images. Experimental results show that the proposed method detects all the tampered regions of the attacked images and high visual quality of watermarked images has been obtained. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.
dc.identifier.doi10.1007/s11042-018-7084-0
dc.identifier.endpage17718
dc.identifier.issn1380-7501
dc.identifier.issue13
dc.identifier.scopus2-s2.0-85059850591
dc.identifier.scopusqualityQ1
dc.identifier.startpage17701
dc.identifier.urihttps://dx.doi.org/10.1007/s11042-018-7084-0
dc.identifier.urihttps://hdl.handle.net/11480/1449
dc.identifier.volume78
dc.identifier.wosWOS:000475703200018
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthor[0-Belirlenecek]
dc.language.isoen
dc.publisherSpringer New York LLC
dc.relation.ispartofMultimedia Tools and Applications
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectFragile image watermarking
dc.subjectImage integrity
dc.subjectSHA-256
dc.titleA novel hash function based fragile watermarking method for image integrity
dc.typeArticle

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