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Hacker hits Toronto transit message system ! - 5/8/2006 12:35:54 PM   
SiliconFreak


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Imagine Gerry Nicholls' surprise when he glanced at the electronic advertising sign on the Toronto-area commuter train he was riding last week and saw this message about the Canadian prime minister scroll across the screen: "Stephen Harper eats babies."

Said Nicholls: "I worked with Harper for five years and I know he has a craving for junk food, but I've never seen him eat a baby." He then explained his role in publicizing a hack of the transit system's message system.

"It was Thursday evening, April 27, about 5:30, and I was leaving Toronto and I was taking the GO Transit train," said Nicholls, vice president of the National Citizens Coalition. "Each car has a little electronic advertising sign and messages scroll across them and usually it's something like buy tickets to this event or messages about train safety. But this time the message on the sign was reading 'Stephen Harper eats babies,' every three seconds. Stephen Harper used to be my boss and he's president of the organization I work for right now."

Nicholls, who lives in a suburb of Toronto, thought the message on the sign was strange and figured it had to be some kind of parody, with some kind of kicker explaining what it meant. But there was no punchline, he said.

"My first thought was maybe I'm hallucinating and that this couldn't be. So I sent an e-mail to the GO Transit people and I put it on my blog. I never got any messages back from the GO Transit people over the next couple days," he said. "But people in the blogging community picked it up, and it sort of got all over the place and local media picked it up. Then I talked about it on a radio station and suddenly the GO Transit people were contacting me. They explained that a hacker got into the system and changed the message. Apparently, this person did it with a wireless device [that] costs about $25 ... at any hardware store or any tech store.... They don't know who it was and apparently it was running all last weekend on different trains."

GO Transit spokesman Edmund Shea explained that Toronto-based Exclusive Advertising, which set up the signs inside the trains, is usually responsible for programming the messages on them. "These are basic scrolling signs with advertising messages and GO Transit messages," he said. "They were installed at least six years ago and they've been problem-free until someone hacked into them and [changed the messages]. There have been about half a dozen incidents since last [April 27]. Unfortunately, they put a message on it that was a slur to our Stephen Harper, our prime minister - obviously, it's not our message. We don't endorse it. We regret that it happened and we're sorry if anyone's been offended, including our prime minister."

Shea said Exclusive Advertising reacted immediately. "Every time we had an incident like that, we took a car out of service and they reprogrammed the message board by deleting the messages and programming in again the correct messages," he said. "Now there's a fix for it that, to my knowledge, was not available back six years ago. And it's having the programming device password protected."

Shea said Exclusive Advertising is in the process of password protecting message boards in all the trains.

Although Shea didn't know exactly how the hacker managed to reprogram the message boards, Greg Donohue, president of Exclusive Advertising, offered some insight.

"We have about 800 of these LED scrolling message signs throughout the fleet of trains on the GO system," Donohue said. "The signs are programmed via an infrared remote control. When we bought the signs about six years ago, it was relatively new technology -- and at the time the signs weren't password protected."

Donohue said that while anyone with that particular remote control could reprogram the signs back then, it the remote control devices weren't available publicly. "You had to buy them through a distributor or the manufacturer and they were sold specifically for industrial use," he said. "But what's transpired over the years is that they are becoming available to the public through retail stores, i.e., Sam's Club. And you can buy the signs bundled with the remotes through other retail outlets. Because they're all on the same frequency, anybody that buys the sign and has the remote can reprogram signs. So what you need is to password protect each one. That's what we're doing now, password protecting them. So then you need a password to alter the message on the LED screen."

Donohue said never expected anything like the sign hacking to occur.

"We've had the signs up for six years and we're phasing them out because we're bringing in flat screen monitors on the trains, so in another year it wouldn't have mattered," he said.

Some detective work by a Canadian blogger may have discovered the identity of the hacker: a 24-year-old Canadian named Joshua, who talks about the incident on his MySpace page and has received kudos from friends for hacking the signs.

An e-mail to Joshua from Computerworld seeking comment went unanswered.


Source : PC World
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