Authenticate an Image under DCT Domain with Attack Recovery

Abstract

Image authentication techniques verify he ntegrity of an image from malicious manipulations.In his paper, aDCT-basedmage authenication approach wthattack recovery, which recoverssome attacked bocks, is proposed. Two quantizationproperties DQP and FQP are presented toembedauthentication feature. These embedded features are olerantto JPEG compression wih quantization stepless than twoimes of the pe-determined quantization step, bus sensitive toother maliciousattacks. Theattacked blocks are indicaed after verifying a protected mageand hen the embedded recoveryfeature isextracted to recover these damaged blocks.Moreover, in case of he damage of recovery feature, an edge-based interpolation recovery approach (EIRA) s proposed o enhance recovery results. Expermental results showhat the atacked blocks can be deeced and recovered efficienty by the proposed approach.