An invention is provided for authentication in a network environment. The invention includes displaying an authentication image on a display device, and generating a captured image by capturing an image using a client device. The captured image then is analyzed to determine color band values of selected pixels of the captured image. Once analyzed, a comparison result is generated by comparing the color band values the selected pixels of the captured image to color band values of corresponding pixels of the authentication image. If the comparison result is within a predetermined threshold authentication is provided.