Digital watermarking has become a promising research area to face the challenges created by the rapid growth in distribution of digital content over the internet. To prevents misuse of this data Digital watermarking techniques are very useful, In which a Secret message called as a watermarks which could be a logo or label, is embedded into multimedia data which again could be used for various applications like copyright protection, authentication, and tamper detection etc.. Based on the requirement of the application the watermark is extracted or detected by detection algorithm to test condition of the data. This paper presents another approach for watermarking image and extracting it for authentication purposes.