Hidden messages in images leave telltale trail

2019-03-02 04:01:07

ELECTRONIC steganography lets you hide messages in pictures or other media so that no one apart from the recipient can tell they are there. But take care if you don’t want anyone else ever to know what you’ve been up to: some steganography programs leave evidence that could give the game away. Several popular software packages encode messages in pictures by making subtle changes to the binary values of their pixels. Now software engineers in Ithaca, New York,