As the use of internet grows rapidly, there are some of the securities problems arise. Electronic security mechanisms are already followed on Internet even than these problems are increased day by day. This paper discusses the current research trend to solve the issues of digital image authentication and integrity. Different systems suggested by researchers to solve the above mentioned issues are studied and are classified as Fragile watermarking system as well as Semi-fragile watermarking system. Some of the researchers also apply the combination of fragile as well as semi-fragile watermarking system. Individually different systems are analyzed where some systems solve the authentication issue, some systems work with tamper localization where as other systems are there which has capability to get back the original image from the tampered image. Review findings are discussed based on the existing systems discussed by other researchers. Some of the challenges come up based on these reviews and are also discussed here.

Digital Watermarking, Image Authentication, Tamper detection, Tamper localization, Self Recovery

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