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How to minimize your digital footprint when you travel

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How to minimize your digital footprint when you travel

Those of us old enough to remember traveling before the age of smartphones and mobile internet know we have it pretty good these days. You can find the best flights using comparison sites, choose among hundreds of hotels on a single booking site, get tickets sent to your phone rather than picking them up in person, check in online, order a ride and you’re off. 

All this, of course, comes with downsides and trade-offs. 

Most people’s biggest concerns are “getting hacked,” which, when you get down to it, really means “being robbed in ways I don’t quite understand.” But that’s one of those risks that, although very real, is unlikely to happen if you take the usual precautions. 

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A couple on vacation (Kurt “CyberGuy” Knutsson)

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The dangers few think about until it’s too late

In a time when personal information is said to be worth more than oil, bad actors are often interested in getting their hands on your personal data as much as your money. And a “bad actor” need not be some guy with his hood up, hunched over a laptop in the back of a coffee shop. 

In 2024, for example, ClassAction.org reported on suspicions of major cruise lines illegally sharing consumers’ data with Facebook. Cruise lines RoyalCaribbean.com, CelebrityCruises.com, Princess.com and HollandAmerica.com are suspected of collecting personal information through the sneaky “Meta tracking pixel” and sending it to Facebook without users’ consent. 

Booking.com, a site most of us have used at one time or another, has also had its fair share of problems. The website has been battling waves of hacking attacks aimed at defrauding its customers; it’s faced accusations of not doing enough to protect its customers and has even been fined for failing to disclose a data breach on time. 

Data gathered from these kinds of incidents often ends up circulating online, being added to what was already out there before, just waiting for someone or some company to make use of it.

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A woman pulling her luggage while traveling (Kurt “CyberGuy” Knutsson)

THE BEST TRAVEL GEAR FOR 2025

What you can do to protect your personal data

Avoiding cruise lines and booking sites altogether is hardly a practical solution when you need to book a cruise or accommodation. Here are some things you can do to dramatically reduce the risk when booking flights, cruises, vehicles and accommodation.

1. Invest in personal data removal services: While no service promises to remove all your data from the internet, having a removal service is great if you want to constantly monitor and automate the process of removing your information from hundreds of sites continuously over a longer period of time. Check out my top picks for data removal services here.

2. Use personal security caution: Don’t sign in to anything using your social media accounts. Sign in with your email instead and be sure to use an email address you’ve set aside just for these kinds of situations.

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3. Do your homework online: Do an online search for the booking website, cruise line or travel agency in question, keeping an eye out for any recent reports of scams or other issues.

4. Check company reputation carefully: Check ClassAction.org, the Better Business Bureau and Trustpilot specifically. This will help you gain comprehensive insights into a company’s track record, customer experiences and potential issues.

5. Verify communication legitimacy: Whenever you receive a call, email or text message from a booking service, confirm that it’s really them by first checking your account directly and then contacting the company through official, publicly listed channels (not social media).

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More ways to protect yourself online when traveling: Here’s how to stay safe

Here are some of the “usual precautions” that can protect you from “getting hacked” while traveling.

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1. Update all your apps and operating systems before heading off: All those security patches are that much more important while you’re traveling. You’ll want to download and install all pending updates at least 24-48 hours before your departure, ensuring you have the latest security protections and giving yourself time to troubleshoot any potential update-related issues that might arise. 

2. Lock everything down: Use strong, unique passwords and a reliable password manager to keep track of them.

3. Turn on two-factor authentication where available: Prioritize using authenticator apps over SMS-based codes. This provides a more secure second layer of verification, as authenticator apps are less vulnerable to SIM swapping attacks and interception compared to text message-based authentication. Choose reputable authenticator apps, which generate time-based one-time passwords that change frequently and are tied directly to your device.

4. Keep location services turned off: NFC, Bluetooth and Wi-Fi should also be turned off while you’re not using them. That’ll make your battery last longer as a side benefit.

5. Go dark: Don’t publicly share news of your trip until you’re back. Avoid posting about your vacation on social media or keeping a blog about your adventures, as this information can be used by criminals to piece together a snapshot of your life.

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WHAT IS ARTIFICIAL INTELLIGENCE (AI)?

6. Limit social media use: Scammers and hackers often exploit social media to gather personal information and target travelers. To stay secure, avoid sharing trip details publicly and use a privacy-focused messaging app like Signal to stay in touch with family and friends.

7. Use privacy-focused browsers: You should consider using browsers like Brave or Firefox with privacy extensions. Enabling “do not track” settings and utilizing private/incognito mode can provide an extra layer of digital protection.

8. Disable automatic Wi-Fi and Bluetooth connections: Disable settings that automatically connect to networks and manually select and verify networks before connecting. This prevents your device from inadvertently joining potentially unsecured networks.

9. Use encrypted messaging and email: Protect your private communications by using services that offer end-to-end encryption for both messaging and email. These platforms ensure your data remains secure from unauthorized access, with features like encryption for non-users, multifactor authentication and tracking protection. See my review of the best secure and private email services here.

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10. Travel with minimal digital gear: Consider bringing a “travel-only” phone or laptop with minimal personal data.

11. Be cautious of public charging stations: Avoid using public USB charging ports that could potentially compromise your device. Instead, carry a portable phone charger with you.

12. Monitor your accounts: Set up transaction alerts on financial accounts and use credit cards with strong fraud protection. Regularly check your accounts while traveling to quickly detect any suspicious activity.

13. Bring your own internet access with you: Find a local or international SIM, a mobile hot spot and a trusted VPN (virtual private network) service for those times you can’t help but use public Wi-Fi. Using a VPN can enhance your privacy by encrypting your internet traffic, making it harder for hackers and third parties to intercept your data, especially on public Wi-Fi. A VPN masks your IP address, helping to obscure your location and online activity. While VPNs don’t directly prevent phishing emails, they reduce the exposure of your browsing habits to trackers that may use this data maliciously. With a VPN, you can securely access your email accounts from anywhere, even in areas with restrictive internet policies. For the best VPN software, see my expert review of the best VPNs for browsing the web privately on your Windows, Mac, Android and iOS devices.

A man holding his passport (Kurt “CyberGuy” Knutsson)

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5 WAYS TO SECURELY ACCESS WI-FI ON YOUR PHONE WHILE TRAVELING

Kurt’s key takeaways

There’s plenty of good advice out there when it comes to avoiding public Wi-Fi and protecting your documents while traveling. To really stay safe, though, it’s important to start thinking about your data privacy and data security before even booking your trip. It doesn’t take much when all is said and done, but it could make a huge difference to how you remember your trip for years to come.

When was the last time technology made your travel more stressful instead of easier? What happened? Let us know by writing us at Cyberguy.com/Contact.

For more of my tech tips and security alerts, subscribe to my free CyberGuy Report Newsletter by heading to Cyberguy.com/Newsletter.

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Technology

Disney Plus is getting vertical video

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Disney Plus is getting vertical video

Disney Plus will be getting a vertical video feed later this year, Disney announced as part of its Global Tech & Data Showcase for advertisers at CES.

Based on an interview with Erin Teague, Disney’s EVP of product management for Disney Entertainment and ESPN, Deadline reports that vertical video in the app could include “original short-form programming, repurposed social clips, refashioned scenes from longer-form episodic or feature titles or a combination.”

“Think all the short-form Disney content you’d want in one unified app,” Teague said onstage at Wednesday’s showcase. “Over time, we’ll evolve the experience as we explore applications for a variety of formats, categories, and content types for a dynamic feed of just what you’re interested in — from Sports, News, and Entertainment — refreshed in real time based on your last visit.”

Update, January 7th: Added quote from Disney’s Erin Teague.

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Technology

Plastic bottles could power your devices one day

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Plastic bottles could power your devices one day

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Each year, billions of single-use plastic bottles end up in landfills or oceans. That waste problem keeps growing. Now, a new scientific breakthrough suggests those same bottles could help power your daily life.

Researchers have developed a way to transform discarded plastic water bottles into high-performance energy storage devices called supercapacitors. The work focuses on PET plastic, short for polyethylene terephthalate, which is used in most beverage bottles. 

The research was published in Energy & Fuels and highlighted by the American Chemical Society. Scientists say the discovery could reduce plastic pollution while helping drive cleaner energy technology.

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SCIENTISTS EXTRACT SILVER FROM E-WASTE USING COOKING OIL

Discarded PET water bottles are one of the most common sources of plastic waste worldwide, with hundreds of billions produced each year. (Kurt “CyberGuy” Knutsson)

Why PET plastic waste is such a growing problem

PET plastic is everywhere. According to the researchers, more than 500 billion single-use PET plastic bottles are produced every year. Most are used once and thrown away. Lead researcher Dr. Yun Hang Hu says that scale creates a major environmental challenge.

Instead of letting that plastic pile up, the team focused on upcycling it into something valuable. Their idea was simple but powerful. Turn waste into materials that support renewable energy systems and reduce production costs at the same time.

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Those upcycled materials come together to form an all-waste-plastic supercapacitor designed for fast charging and long term energy storage. (Kurt “CyberGuy” Knutsson)

How plastic bottles can store and release energy

Imagine a device that can charge fast and deliver power instantly. That is exactly what supercapacitors do. They store and release energy much faster than traditional batteries, which makes them useful for electric vehicles, solar power systems and everyday electronics. 

Hu’s team found a way to build these energy storage components using discarded PET plastic water bottles. By reshaping the plastic at extremely high temperatures, the researchers turned waste into materials that can generate electricity efficiently and repeatedly.

Here is how the process works:

For the electrodes, researchers cut PET bottles into tiny, grain-sized pieces. They mixed the plastic with calcium hydroxide and heated it to nearly 1,300 degrees Fahrenheit in a vacuum. That heat transformed the plastic into a porous, electrically conductive carbon powder.

The powder was then formed into thin electrode layers. For the separator, small pieces of PET were flattened and carefully perforated with hot needles. This pattern allowed electric current to pass efficiently while maintaining safety and durability. Once assembled, the device used two carbon electrodes separated by the PET film and submerged in a potassium hydroxide electrolyte.

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CIGARETTE BUTTS MAKE ROADS STRONGER THAN EVER BEFORE

Researchers use extreme heat to convert waste PET plastic into porous carbon materials that can store and move electricity efficiently. (Kurt “CyberGuy” Knutsson)

Why the results surprised scientists

When tested, the all-waste-plastic supercapacitor outperformed similar devices made with traditional glass fiber separators. After repeated charging and discharging, it retained 79 percent of its energy capacity. A comparable glass fiber device retained 78 percent. That difference matters. The PET-based design costs less to produce, remains fully recyclable, and supports circular energy storage technologies where waste materials are reused instead of discarded.

What this means for you

This breakthrough could affect everyday life sooner than you might expect. Cheaper supercapacitors can lower the cost of electric vehicles, solar systems and portable electronics. Faster charging and longer device lifespans could follow. It also shows that sustainability does not require giving something up. Waste plastics could become part of the solution instead of the problem. Although this technology is still in development, the research team believes PET-based supercapacitors could reach commercial markets within 5 to 10 years. In the meantime, choosing reusable bottles and plastic-free alternatives still helps reduce waste today.

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Kurt’s key takeaways

Turning trash into energy storage is more than a clever idea. It shows how science can tackle two global challenges at once. Plastic pollution continues to grow. Energy demand does too. This research proves that those problems do not have to be solved separately. By rethinking waste as a resource, scientists are building a cleaner and more efficient future from materials we already throw away.

If your empty water bottle could one day help power your home or car, would you still see it as trash? Let us know by writing to us at Cyberguy.com.

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Amazon’s smart shopping cart for Whole Foods gets bigger, lighter, and adds tap-to-pay

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Amazon’s smart shopping cart for Whole Foods gets bigger, lighter, and adds tap-to-pay

Amazon is launching a revamped version of its smart shopping cart, which it plans to bring to dozens of Whole Foods locations by the end of this year, according to an announcement on Wednesday. The new Dash Cart features a “more responsive” item scanner that’s now located next to the built-in display, along with a new NFC reader that lets you tap to pay with your credit card or phone.

Amazon’s previous Dash Cart design put scanners beneath and in front of the handle, potentially making them harder to spot. It also only let you pay with the credit card attached to your Amazon account.

With the upgraded Dash Cart, you’ll find a new scale alongside the cart’s handle, which Amazon says “works in tandem with on-cart cameras, weight sensors, and deep learning models to ensure accurate pricing for every item.” The upgraded Dash Cart eliminates the large sensors facing inside the cart as well, offering a 40 percent larger capacity and a 25 percent lighter weight.

The Dash Cart shows an interactive map of the store on its display, similar to Instacart’s smart Caper Cart. You can sync your shopping list created with Alexa, too, and see how much you’re spending as you add more items to your cart. The cart uses built-in sensors and computer vision to detect when you’ve removed an item, allowing it to automatically update your total. When you’re done shopping, you can skip the checkout line and leave the store in a designated Dash Cart lane.

Amazon is launching its new Dash Cart as the company shakes up its grocery business, which has tied Whole Foods more closely to the Amazon brand. The company has already brought its new Dash Cart to three Whole Foods stores in McKinney, Texas; Reston, Virginia; and Westford, Massachusetts, along with two Amazon Fresh stores.

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