Improved Security and Authentication of Digital Image

Image security sometimes shortened to InfoSec, is the practice of defending information from unauthorized access, use, disclosure, disruption, modification, inspection, recording or destruction. It is a general term that can be used regardless of the form the data Multimedia authentication has recently gained considerable attention due to the readily available multimedia editing and reconstruction tools and the need for transmission of multimedia objects, such as audio video and text, over non-secure networks. Authentication of these multimedia objects is very different from standard data authentication. Multimedia data is almost always preprocessed or modified before usage or transmission over (insecure) networks. The preprocessing and modifications include operations such as compression, quantization, scaling, cropping etc. These operations affect the multimedia data; however, the content remains unaffected. Standard authentication mechanisms are effective in authenticating the actual multimedia data but not in authenticating the multimedia content.