Writes data (e. g. files, passwords, encrypted text, ...) hidden in an image. The data will be hidden in the color-channels from the image. There is no difference for human eyes between the image with no hidden data and the image with hidden data!
Expression4J (Math Expression Parser) is a java framework used to manage mathematic expression stored in String object like "f(x,b)=2*x-cos(b)" or "g(x,y)=f(y,x)*-2". Expression gramar can be define by user (add new operator or type ...)