Security, Control and the Future of Everything
Posted in Internet, digital business, media, security on January 3rd, 2010 by irv – 2 CommentsTwo unrelated things clicked in my head today as actually being related on a theoretical level. Thing one I spent some time the other day looking over the websites of some potential vendors. I’ve done this sort of thing lots of times before. As per usual, I was unimpressed by the websites themselves (which may or may not say much about the company itself). Thing two: Someone cracked the algorithm for cell phone signal encryption (really a sort of hiding) to the internet. Both these things show the conflict between the old industrial era way of doing things (let’s call it web 0.5) and the newer Twitter-ified way of doing things (web X.0). It tells us a lot about the changing generations and the growing struggles of the information age.
After that slightly pompous lead in, it’s tempting to just stop but I’ll add some detail, starting with the cell phone encryption code, which is a pretty big deal news-wise. The biggest weakness of cell phone security – and it’s a very big weakness – is that, in order to work, cells broadcast their signal in all directions at once. It’s not like the old fashioned landline phones that send their signal down a wire. In order to intercept the signal of one of those old phones, you have to tap the physical wire. In order to intercept a broadcast signal, on the other hand, you just need to be within range with the right equipment.
For a couple decades now, most cell phones have attempted to evade broadcast interception by (somewhat) randomly changing frequency multiple times during every transmission. That way it’s very hard to intercept more than a single tiny portion of the signal, hopefully too tiny a portion to make sense out of the message. The flaw in this scheme is that for the message to be received, the other end (the cell tower) must be able to follow all the frequency hops and put the complete transmission back together. So both ends need to be synchronized. True randomness is impossible.
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