Image”. Web Application Steganography — Marko Steve and Marko Steve Steganography is a means to encode or hide data, and has been an essential part of cryptography and information security for more than 100 years and is still widely used. Image Stealing — Anonymous Steganography is an art for hiding secret messages in images. It involves taking the original image and using it to encode another image using the original image and using a set of cryptographic keys. Online Secure Steganography Service — Anonymous Use the above website to hide secret messages inside another image (typically a .png file).