Computer security: Spam in the fridge
“THE internet of things” is one of the buzziest bits of jargon around in consumer electronics. The idea is to put computers in all kinds of products—televisions, washing machines, thermostats, refrigerators—that have not, traditionally, been computerised, and then connect those products to the internet.
If you are in marketing, this is a great idea. Being able to browse the internet from your television, switch on your washing machine from the office or have your fridge e-mail you to say that you are running out of orange juice is a good way to sell more televisions, washing machines and fridges. If you are a computer-security researcher, though, it is a little worrying. For, as owners of desktop computers are all too aware, the internet is a two-way street. Once a device is online, people other than its owners may be able to connect to it and persuade it to do their bidding.
On January 16th a computer-security company called Proofpoint said it had seen exactly that happening. It reported the existence of a group of compromised computers which was at least partly comprised of smart devices, including home routers, burglar alarms, webcams and a refrigerator. The devices were being used to send spam and “phishing” e-mails, which contain malware that tries to steal useful information such as passwords.
The network is not particularly big, as these things go. It contains around 100,000 devices and has sent about 750,000 e-mails. But it is a proof of concept, and may be a harbinger of worse to come—for the computers in smart devices make tempting targets for writers of malware. Security is often lax, or non-existent. Many of the computers identified by Proofpoint seem to have been hacked by trying the factory-set usernames and passwords that buyers are supposed to change. (Most never bother.) The computers in smart devices are based on a small selection of cheap off-the-shelf hardware and usually run standard software. This means that compromising one is likely to compromise many others at the same time. And smart devices lack many of the protections available to desktop computers, which can run antivirus programs and which receive regular security updates from software-makers.
Ross Anderson, a computer-security researcher at Cambridge University, has been worrying about the risks of smart devices for years.
The Latest on: Compromised computers
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The Latest on: Compromised computers
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