A novel double layered image steganography in spatial domain using triangular number system

Presently, in digital scenario, the most prime requirement is to secure data while transmitting through communication channel. Commonly, cryptography and steganography are used to achieve this purpose. In this work, we propose a novel spatial domain image steganography by converting the pixel intensity value into Triangular base. Our algorithm is capable of hiding 8 bits per pixel of an image component without keeping any perceptible signature which is much higher than state-of-the-art works without keeping any perceptible signature into the stego image. Besides histogram and other quality metrics analysis, we also show that our algorithm resists the statistical attacks like x2-test, etc., and all the standard test provided by the benchmark like StirMark.