An 'ex-hacker' has revealed why you shouldn't leave any of your keycards or security cards lying around. Watch below:
TikToker Marcus Hutchins explains how he picked up a device for 'a few hundred dollars' called 'Proxmark', which can 'clone anything to 'HID cards to hotel keys'.
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What the heck is a Proxmark, you might ask?
Well, according to proxmark.com: "The Proxmark is an RFID swiss-army tool, allowing for both high and low-level interactions with the vast majority of RFID tags and systems worldwide."
Marcus's TikTok bio reads: "Ex hacker, current felon. Teaching Cybersecurity."
"You probably shouldn't leave access cards lying around," he said.
He showcases that, within seconds, his Proxmark reads the data of his key card.
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Marcus added: "The best part is that it'll even through a coat pocket.
"Now, obviously this whole set-up with the laptop is a bit inconspicuous so you can actually put it in 'mobile mode' and it'll work from a battery pack.
"Holding down the button will start to scan and when it comes into contact with a key it will save the data.
Marcus then throws on a hoodie and hides the tech underneath it to appear unnoticed.
He attaches the battery pack to his Proxmark and places it in his back pockets.
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Next, he connects an antenna to a really long USB cable and puts it down his sleeve, plugging it into the back of his Proxmark.
"[Now] I've got the data off the card I can create an identical key but it's a lot more fun to use the proxmark itself as a key."
The viral video was posted on 15 August and has since racked up 4.5 million views and 486,000 likes.
One user, incredibly, pointed out: "You could steal a Tesla theoretically with this since they use a card."
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A second user added: "I can't decide if this is awesome or terrifying."
Whilst a final user joked: "I'm so grateful you're teaching people how to be scammers" to which Marcus replied: "As I have already said: this isn't a tutorial. It doesn't explain any of how to do it."
Well, we know we definitely won't be leaving any cards lying around unattended from now on!
Featured Image Credit: TikTok/@malwaretech