Editor's note: Bruce Schneier is a security technologist and author of "Liars and Outliers: Enabling the Trust Society Needs to Survive."
(CNN) -- Last weekend a Texas couple apparently discovered that the electronic "baby monitor" in their children's bedroom had been hacked. According to a local TV station, the couple said they heard an unfamiliar voice coming from the room, went to investigate and found that someone had taken control of the camera monitor remotely and was shouting profanity-laden abuse. The child's father unplugged the monitor.
What does this mean for the rest of us? How secure are consumer electronic systems, now that they're all attached to the Internet?
The answer is not very, and it's been this bad for many years. Security vulnerabilities have been found in all types of webcams, cameras of all sorts, implanted medical devices, cars, and even smart toilets -- not to mention yachts, ATM machines, industrial control systems and military drones.
All of these things have long been hackable. Those of us who work in security are often amazed that most people don't know about it.
Why are they hackable? Because security is very hard to get right. It takes expertise, and it takes time. Most companies don't care because most customers buying security systems and smart appliances don't know enough to care. Why should a baby monitor manufacturer spend all sorts of money making sure its security is good when the average customer won't even notice?
Even worse, that consumer will look at two competing baby monitors -- a more expensive one with better security, and a cheaper one with minimal security -- and buy the cheaper. Without the expertise to make an informed buying decision, cheaper wins.
A lot of hacks happen because the users don't configure or install their devices properly, but that's really the fault of the manufacturer. These are supposed to be consumer devices, not specialized equipment for security experts only.
This sort of thing is true in other aspects of society, and we have a variety of mechanisms to deal with it. Government regulation is one of them. For example, few of us can differentiate real pharmaceuticals from snake oil, so the FDA regulates what can be sold and what sorts of claims vendors can make. Independent product testing is another. You and I might not be able to tell a well-made car from a poorly-made one at a glance, but we can both read the reports from a variety of testing agencies.
Computer security has resisted these mechanisms, both because the industry changes so quickly and because this sort of testing is hard and expensive. But the effect is that we're all being sold a lot of insecure consumer products with embedded computers. And as these computers get connected to the Internet, the problems will get worse.
The moral here isn't that your baby monitor could be hacked. The moral is that pretty much every "smart" everything can be hacked, and because consumers don't care, the market won't fix the problem.
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The opinions expressed in this commentary are solely those of Bruce Schneier.