itself, in my humble opinion, is bizarre. It reads less like a PSA from an official security agency, and more like a social media post typed up by a summer intern. The largest red flag for me is this sentence, which reads: "Hackers can install malware at USB ports (we’ve been told that’s called “juice/port jacking”)." I would like to think an agency like the TSA wouldn't need to be told what a supposed security threat is called.
The worry here is that bad actors can infect these publicly accessible ports with malware, so when you plug in, the malware installs itself on your device. This is what's known as juice jacking or port jacking.
Bad actors would also need to contend with USB cables that are charging only, with no support for data transfer. Maybe your cable allows for data transfer, but maybe someone else's doesn't. Even if yours does, many modern smartphones require you to grant permission to access the USB device before you can initiate a data transfer. Without that permission, the connection will only charge your device. While it is true that researchers have found ways around these defenses, there are too many variables out there for this to be an effective malware installation method, and if I were a hacker, I just wouldn't think the juice was worth the squeeze.
The first is to use a USB "condom:" USB condoms essentially turn any cable into a charging-only cable, by blocking all data transfer capabilities. If you have a USB cable that would otherwise happily install malware on your device, a USB condom will block this activity, so you can charge safely and securely. But you don't need one of these devices to safely charge your devices at the airport: Just use the wall outlets. These pose no risk of juice jacking, since there are no data transfer capabilities here. Just plug your power adapter into the outlet as you normally would, and charge away with peace of mind.
Is public wifi safe?
Since 2018, however, the vast majority of websites you visit are encrypted. That means even if you use public wifi without encryption, the actual web traffic is protected. Hackers won't be able to see the information you enter on those sites, as long as it is indeed encrypted.
Now, you'll still want to ensure the website you're visiting is not only encrypted, but legitimate. Phishing sites can use HTTPS too, so make sure you're actually visiting your bank's website before plugging in your information. That advice, of course, applies whether you're using public wifi or your home wifi, anyway. You can also protect your web browsing even more with a VPN, which reroutes your traffic to make it much more difficult to track you. You might be connecting through the Denver airport, but your traffic could look like it's coming from Japan, Panama, or Iceland.
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