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It's Scary How Much Personal Data People Leave on Used Laptops and Phones, Researcher Finds (gizmodo.com)
A recent experiment by Josh Frantz, a senior security consultant at Rapid7, suggests that users are taking few if any steps to protect their private information before releasing their used devices back out into the wild. From a report: For around six months, he collected used desktop, hard disks, cellphones and more from pawn shops near his home in Wisconsin. It turned out they contain a wealth of private data belonging to their former owners, including a ton of personally identifiable information (PII) -- the bread and butter of identity theft. Frantz amassed a respectable stockpile of refurbished, donated, and used hardware: 41 desktops and laptops, 27 pieces of removable media (memory cards and flash drives), 11 hard disks, and six cellphones. The total cost of the experiment was a lot less than you'd imagine. "I visited a total of 31 businesses and bought whatever I could get my hands on for a grand total of around $600," he said.
Frantz used a Python-based optical character recognition (OCR) tool to scan for Social Security numbers, dates of birth, credit card information, and other sensitive data. And the result was, as you might expect, not good. The pile of junk turned out to contain 41 Social Security numbers, 50 dates of birth, 611 email accounts, 19 credit card numbers, two passport numbers, and six driver's license numbers. Additionally, more than 200,000 images were contained on the devices and over 3,400 documents. He also extracted nearly 150,000 emails.
Frantz used a Python-based optical character recognition (OCR) tool to scan for Social Security numbers, dates of birth, credit card information, and other sensitive data. And the result was, as you might expect, not good. The pile of junk turned out to contain 41 Social Security numbers, 50 dates of birth, 611 email accounts, 19 credit card numbers, two passport numbers, and six driver's license numbers. Additionally, more than 200,000 images were contained on the devices and over 3,400 documents. He also extracted nearly 150,000 emails.
I'm going to guess that the seller wasn't all that interested in protecting the clients of the business that he stole that computer from...
Yesterday, BeauHD posted an article related to the fact that California is re-introducing right-to-repair legislation, which, believe it or not, is related to this topic.
If I can open a slot on the bottom of my laptop and easily replace the internal storage drive (on my PS/3 and PS/4 doing this requires removal of one screw), then I can be 100% certain that I am not leaking data if I sell on my old device. Yes, OK, I still have to buy a new drive and maybe re-install the OS on it, but these are simple enough tasks these days.
With the advent of devices with integrated storage, often soldered on to motherboards, this becomes impossible. What this now means is that the original manufacturer would have to come up with a way to *guarantee* you that all data on embedded storage had been securely wiped. Otherwise, their failure to do that, coupled with negligent design or negligent security implementations, could result in the loss of your personal data.
I wonder how many smartphone/tablet/similar device manufacturers would be willing to step up and own that liability in return for being able to prevent you from upgrading or repairing your device. I'm betting not that many.
Always look for crypto-currency wallets/numbers/keys/passwords.
I once found a used laptop with a dogecoin wallet on it, there was still 15 coins in it!
Needless to say, I still went to work the next day.
#DeleteFacebook
If it was on E-Bay, consider the possibility the laptop was stolen.
People steal shit like this all the time from desks, vehicles, etc. which is why all of our corporate laptops have full drive encryption.
I typically overwrite all sectors on a HD for a month with random crap, and drill holes in the platters.
After that it gets spun around inside a 15 Tesla magnet for 2 hours. Then I use thermite to melt it into a pool of slag, grind up the slag into a fine powder and divide that into 5 equal portions.
I feed one of those portions to my dogs and then set half of their waste on fire and put the other half into the garbage. I use honey to stick another portion to the bird seed I have in a feeder. The third portion I take to a metal recycling place. The fourth portion gets flushed down the toilet. The fifth portion is in a safe deposit box, just in case I need to recover anything.
If I'm being extra careful, I encrypt the drive with ROT13, twice, before the random writes.