the main aim of the project is to combine the three independent models such as watermark embedding, data embedding and data extraction into one model. This paper is composed of three parts: watermark embedding, data embedding and data extraction. In watermark embedding model, we are creating the watermarked image by adding watermark data to the original host image using the new fragile watermarking algorithm. The host image may be face, signature or any biometric identification. The result of this will be the watermarked image. The second model is data embedding model, the input of this model is the output of the first model. In this model we are going to add the message or data in a watermarked image through a steganography technique and with the help of secret key. The result of this model is the data with watermarked image; this is known as stego image is transmitted over a channel to the receiver. In the data extraction model, receiver receives the stego image and will extract data. To retrieve data a secret key is required which is embedded in image. This guarantee integrity and confidentiality of the data. One of the applications of our proposed scheme is verifying data integrity for images transferred over the internet.

Keywords : Cryptography; Steganography; AES; RSA; Key.