Image Authentication System based on Digital Watermark and Digital Signature

In this paper to protect copyright, ownershipand content integrity of digital media includingdigital watermarking techniques. The primarymotivation of this article is to study the principles ofcryptographic primitives and watermarking schemes.In this paper, we propose a secure verificationsystem for watermarked images with the intention ofcopyright protection. RSA algorithm, RSA signature,multi-signatures,, and LSB technique are employedin the proposed system. The proposed system isdeveloped by C# programming language. Thisprojected system can withstand compressionbrightness and no attack can destroy copyright of theimage, in addition, no one can alter content oftransmitted images. In this paper ,we use RSA multi-signature algorithm to protect unauthorizeddistribution and LSB technique to embed and detectwatermark