Authentication in Digital Images

digital image authentication . To provide digital image authentication we depending on the ideas of one way hash function , message digest , and digital signature . An efficient method for digital image watermarking was suggested . This work combines between user authentication and digital image authentication , so that it allows the receiver of a digital image to be confident of both that the digital image is authentic and it is delivered from authorized source . The goal of this research is to detect any intrusion modification on the digital image while sending through computer networks .