A coverless image steganography based on robust image wavelet hashing

Since the concept of coverless information hiding was proposed, it has been greatly developed due to its effectiveness resisting steganographic tools. In this paper, a new steganography is presented hide secret data in more secure way and enhance robustness against attacks. This method depends on frequency domain. The embedding process consists several steps. Firstly, divided into no overlapping segments. Secondly, set images collected find appropriate be stego images. Thirdly, build hash sequence for an image, powerful hashing algorithm used. Fourthly, each image sequence, inverted index structure created. Fifthly, choose which equivalent segment. Several tests are done measure proposed method. results experiments reveal that strategy resistant variety processing attacks such as joint photographic experts group (JPEG) compression, noise, low pass filtering, scaling, rotation median mean filter, brightness, sharpening.