Hiding files in Flickr pics will fool web censors

 作者:怀婶     |      日期:2017-06-22 03:01:00
PEOPLE in countries that try to bar access to certain websites will soon have a way to evade the censors. A system called Collage can embed pages from censored sites in images that it posts on the Flickr photo-sharing site. Users can then read the pages by accessing the seemingly innocent Flickr images. Collage uses a technique known as digital steganography to hide the pages without obviously affecting the appearance of the image. A prototype version is being unveiled this week at the USENIX Security Symposium in Washington DC. Both encoding and decoding the pages are automated,