Enhanced stego-crypto techniques of data hiding through geometrical figures in an image

Cryptography is a technique for secret communication where as obscuring the secret communication using for different data is Steganography. The secret communication is carried through many sources like image, audio & video files. Our work is mainly proposing data hiding by embedding the message of interest using geometric style of cryptographic algorithm, thus providing high security. Wavelet and curvelet transform algorithms are used to perform preprocessing of images. Even if the image carrying embedded data i.e., Stego image undergoes a reverse operation and data cannot be extracted if the receiver is unaware of the exact coordinates of the geometric shape. Hence retrieving secret image for an attacker becomes a hard task. Our Experimental results are verified for both the properties of Cryptography and Steganography it may be applicable for kind of multimedia applications.