An Adaptive Image Steganography Method Based on Histogram of Oriented Gradient and PVD-LSB Techniques

In this work, encryption & decryption process will take place based on Histogram of Oriented Gradient (HOG) and Pixel Value Differencing (PVD)-Least Significant Bit (LSB) substitution. Steganography is the practice of hiding a secret message inside of something that is no secret. 

Due to the increase and urgent demand for data transmission through social networks, information hiding was one of the most critical concerns in human societies. The common use of the Internet and cloud providers in data storage over open networks and unreliable platforms expose private and confidential data to dangerous circumstances. A number of data hiding schemes have been developed, including steganography, in order to keep an unauthorized individual from transmitting the information. 

Applied to the hiding of sensitive documents on different forms of digital media, such as photographs, audio and video, and email. Here, we embed and extract the text message into images and text messages from the image.

Keywords: Data hiding, Steganography, Pixel value differencing, Least significant bit, Histogram of oriented gradient, HOG.