A new fragile watermarking technique for image authentication

Abstract

A new fragile watermarking technique is proposed for image authentication. A logo is embedded as the watermark for integrity authentication and tamper detection. Different from most existing schemes, to resolve the existing security problem, an image feature is selected and hashed to generate the chaotic key, which adds uncertainty to the bits of each watermark. Theoretical analysis and experimental results demonstrate its effectiveness in resisting existing attacks and its good localization property.