Shostack + Friends Blog Archive


More on "A Ping" Privacy Invasion

Before I’d had much in the way of coffee, I thought that the “Firefox Ping URLs” might offer a way to scan the web for sites to avoid. It would be simple. For each site mentioned in a ping URL, add it to a blacklist. The trouble with this is that the same set of people who won’t offer fast redirects will simply set their ping servers to be the same machines that serve their content.