Re: Graphic encryption

Is there anything particular in graphic encryption? I usually encrypt graphics and document images as regular files with regular encryption...

I believe graphic encryption outputs a valid image file that is apparently white noise until you perform the decryption transformation on it. An obvious way to do this with a non-lossy file format is to encrypt pixel vales with a stream cipher. Another way to make the image unviewable would be to shuffle the pixels or rasters with a PRNG. andrew