There was an article on Slashdot a while ago, and I can't seem to find it with a search engine. Some researchers were able to intercept the data traveling over a cable without touching any of it - they essentially measured the signals transmitted as a side effect from the cable. I need it for part of a homework assignment but I can't seem to find anything about it. Any one know the article I'm talking about or any other technical term I can use to find this?