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What Is a Passkey? Here’s How to Set Up and Use Them (2025)

Passkeys were built to enable a password-free future. Here's what they are and how you can start using them.

How Data Brokers Sell Your Identity

Data Privacy Week is here, and there’s no better time to shine a spotlight on one of the biggest players in the personal information economy: data brokers. These entities collect, buy, and sell hundreds—sometimes thousands—of data points on individuals like you. But how do they manage to gather so much information, and for what purpose? From your browsing habits and purchase history to your location data and even more intimate details, these digital middlemen piece together surprisingly comprehensive profiles. The real question is: where are they getting it all, and why is your personal data so valuable to them? Let’s unravel the mystery behind the data broker industry.

What are data brokers?

Data brokers aggregate user info from various sources on the internet. They collect, collate, package, and sometimes even analyze this data to create a holistic and coherent version of you online. This data then gets put up for sale to nearly anyone who’ll buy it. That can include marketers, private investigators, tech companies, and sometimes law enforcement as well. They’ll also sell to spammers and scammers. (Those bad actors need to get your contact info from somewhere — data brokers are one way to get that and more.)

And that list of potential buyers goes on, which includes but isn’t limited to:

  • Tech platforms
  • Banks
  • Insurance companies
  • Political consultancies
  • Marketing firms
  • Retailers
  • Crime-fighting bureaus
  • Investigation bureaus
  • Video streaming service providers
  • Any other businesses involved in sales

These companies and social media platforms use your data to better understand target demographics and the content with which they interact. While the practice isn’t unethical in and of itself (personalizing user experiences and creating more convenient UIs are usually cited as the primary reasons for it), it does make your data vulnerable to malicious attacks targeted toward big-tech servers.

How do data brokers get your information?

Most of your online activities are related. Devices like your phone, laptop, tablets, and even fitness watches are linked to each other. Moreover, you might use one email ID for various accounts and subscriptions. This online interconnectedness makes it easier for data brokers to create a cohesive user profile.

Mobile phone apps are the most common way for data brokerage firms to collect your data. You might have countless apps for various purposes, such as financial transactions, health and fitness, or social media.

A number of these apps usually fall under the umbrella of the same or subsidiary family of apps, all of which work toward collecting and supplying data to big tech platforms. Programs like Google’s AdSense make it easier for developers to monetize their apps in exchange for the user information they collect.

Data brokers also collect data points like your home address, full name, phone number, and date of birth. They have automated scraping tools to quickly collect relevant information from public records (think sales of real estate, marriages, divorces, voter registration, and so on).

Lastly, data brokers can gather data from other third parties that track your cookies or even place trackers or cookies on your browsers. Cookies are small data files that track your online activities when visiting different websites. They track your IP address and browsing history, which third parties can exploit. Cookies are also the reason you see personalized ads and products.

How data brokers sell your identity

Data brokers collate your private information into one package and sell it to “people search” websites. As mentioned above, practically anyone can access these websites and purchase extensive consumer data, for groups of people and individuals alike.

Next, marketing and sales firms are some of data brokers’ biggest clients. These companies purchase massive data sets from data brokers to research your data profile. They have advanced algorithms to segregate users into various consumer groups and target you specifically. Their predictive algorithms can suggest personalized ads and products to generate higher lead generation and conversation percentages for their clients.

Are data brokers legal?

We tend to accept the terms and conditions that various apps ask us to accept without thinking twice or reading the fine print. You probably cannot proceed without letting the app track certain data or giving your personal information. To a certain extent, we trade some of our privacy for convenience. This becomes public information, and apps and data brokers collect, track, and use our data however they please while still complying with the law.

There is no comprehensive privacy law in the U.S. on a federal level. This allows data brokers to collect personal information and condense it into marketing insights. While not all methods of gathering private data are legal, it is difficult to track the activities of data brokers online (especially on the dark web). As technology advances, there are also easier ways to harvest and exploit data.

As of March 2024, 15 states in the U.S. have data privacy laws in place. That includes California, Virginia, Connecticut, Colorado, Utah, Iowa, Indiana, Tennessee, Oregon, Montana, Texas, Delaware, Florida, New Jersey, and New Hampshire.[i] The laws vary by state, yet generally, they grant rights to individuals around the collection, use, and disclosure of their personal data by businesses.

However, these laws make exceptions for certain types of data and certain types of collectors. In short, these laws aren’t absolute.

Can you remove yourself from data broker websites?

Some data brokers let you remove your information from their websites. There are also extensive guides available online that list the method by which you can opt-out of some of the biggest data brokering firms. For example, a guide by Griffin Boyce, the systems administrator at Harvard University’s Berkman Klein Center for Internet and Society, provides detailed information on how to opt-out of a long list of data broker companies.

Yet the list of data brokers is long. Cleaning up your personal data online can quickly eat up your time, as it requires you to reach out to multiple data brokers and opt-out.

Rather than removing yourself one by one from the host of data broker sites out there, you have a solid option: our Personal Data Cleanup.

Personal Data Cleanup scans data broker sites and shows you which ones are selling your personal info. It also provides guidance on how you can remove your data from those sites. And if you want to save time on manually removing that info, you have options. Our McAfee+ Advanced and Ultimate plans come with full-service Personal Data Cleanup, which sends requests to remove your data automatically.

If the thought of your personal info getting bought and sold in such a public way bothers you, our Personal Data Cleanup can put you back in charge of it.

[i] https://pro.bloomberglaw.com/insights/privacy/state-privacy-legislation-tracker/

 

The post How Data Brokers Sell Your Identity appeared first on McAfee Blog.

What Personal Data Do Companies Track?

Private tech companies gather tremendous amounts of user data. These companies can afford to let you use social media platforms free of charge because it’s paid for by your data, attention, and time.

Big tech derives most of its profits by selling your attention to advertisers — a well-known business model. Various documentaries (like Netflix’s “The Social Dilemma”) have tried to get to the bottom of the complex algorithms that big tech companies employ to mine and analyze user data for the benefit of third-party advertisers.

What info can companies collect?

Tech companies benefit from personal info by being able to provide personalized ads. When you click “yes” at the end of a terms and conditions agreement found on some web pages, you might be allowing the companies to collect the following data:

  • Personal data. This includes identity-related info like your name, gender, Social Security number, and device-related info like IP address, web browser cookies, and device IDs. Personal data is usually collected to classify users into different demographics based on certain parameters. This helps advertisers analyze what sections of the audience interact with their ads and what they can do to cater to their target audience.
  • Usage data. Your interactions with a business’s website, text messages, emails, paid ads, and other online activities are recorded to build an accurate consumer profile. This consumer profile is used to determine and predict what kind of content (including ads) you’re more likely to interact with and for how long.
  • Behavioral data. Purchase histories, repeated actions, time spent, movement, and navigation on the platform, and other types of qualitative data are covered under behavioral data. This helps platforms determine your “favorite” purchases or interactions so they can suggest other similar content/products.
  • Attitudinal data. Companies measure brand and customer experiences using data on consumer satisfaction, product desirability, and purchase decisions. Marketing agencies use this data for direct consumer research and creative analysis.

For someone unfamiliar with privacy issues, it is important to understand the extent of big tech’s tracking and data collection. After these companies collect data, all this info can be supplied to third-party businesses or used to improve user experience.

The problem with this is that big tech has blurred the line between collecting customer data and violating user privacy in some cases. While tracking what content you interact with can be justified under the garb of personalizing the content you see, big tech platforms have been known to go too far. Prominent social networks like Facebook and LinkedIn have faced legal trouble for accessing personal user data like private messages and saved photos.

How do companies use the info you provide?

The info you provide helps build an accurate character profile and turns it into knowledge that gives actionable insights to businesses. Private data usage can be classified into three cases: selling it to data brokers, using it to improve marketing, or enhancing customer experience.

To sell your info to data brokers

Along with big data, another industry has seen rapid growth: data brokers. Data brokers buy, analyze, and package your data. Companies that collect large amounts of data on their users stand to profit from this service. Selling data to brokers is an important revenue stream for big tech companies.

Advertisers and businesses benefit from increased info on their consumers, creating a high demand for your info. The problem here is that companies like Facebook and Alphabet (Google’s parent company) have been known to mine massive amounts of user data for the sake of their advertisers.

To personalize marketing efforts

Marketing can be highly personalized thanks to the availability of large amounts of consumer data. Tracking your response to marketing campaigns can help businesses alter or improve certain aspects of their campaign to drive better results.

The problem is that most AI-based algorithms are incapable of assessing when they should stop collecting or using your info. After a point, users run the risk of being constantly subjected to intrusive ads and other unconsented marketing campaigns that pop up frequently.

To cater to the customer experience

Analyzing consumer behavior through reviews, feedback, and recommendations can help improve customer experience. Businesses have access to various facets of data that can be analyzed to show them how to meet consumer demands. This might help improve any part of a consumer’s interaction with the company, from designing special offers and discounts to improving customer relationships.

For most social media platforms, the goal is to curate a personalized feed that appeals to users and allows them to spend more time on the app. When left unmonitored, the powerful algorithms behind these social media platforms can repeatedly subject you to the same kind of content from different creators.

Which companies track the most info?

Here are the big tech companies that collect and mine the most user data.

  • Google is the most avid big tech data miner currently on the internet because the search engine deals almost exclusively with user data. Google tracks and analyzes everything from your Gmail and calling history (for VoLTE calls) to your Chrome browsing preferences through third-party cookies.
  • Meta’s Facebook collects phone numbers, personal messages, public comments, and metadata from all your photos and videos. Facebook primarily uses this data to fuel its demographic-based targeted ad mechanisms.
  • Amazon has recently admitted to storing many user data points, including phone numbers, credit card info, usernames, passwords, and even Social Security numbers. Amazon also stores info about your search terms and previously bought products.
  • X (Twitter).Platforms like X employ a “family of apps” technique to gather sensitive user data. While these platforms openly collect and mine user data themselves, they also collect info from app networks that include several other third-party apps. These apps choose to partner with tech giants for better profits.
  • While much better than its competitors, Apple still mines a lot of user data. While Apple’s systems allow users to control their privacy settings, Apple gives all its users’ info to Apple’s iOS-based advertisement channels. The iPhone App Store is another place where user data is exclusively used to create customized user experiences.
  • Microsoft primarily collects device-related data like system configurations, system capabilities, IP addresses, and port numbers. It also harvests your regular search and query data to customize your search options and make for a better user experience.

Discover how McAfee can help protect your identity online. 

Users need a comprehensive data privacy solution to tackle the rampant, large-scale data mining carried out by big tech platforms. While targeted advertisements and easily found items are beneficial, many of these companies collect and mine user data through several channels simultaneously, exploiting them in several ways.

It’s important to ensure your personal info is protected. Protection solutions like McAfee’s Personal Data Cleanup feature can help. It scours the web for traces of your personal info and helps remove it for your online privacy.

McAfee+ provides antivirus software for all your digital devices and a secure VPN connection to avoid exposure to malicious third parties while browsing the internet. Our Identity Monitoring and personal data removal solutions further remove gaps in your devices’ security systems.

With our data protection and custom guidance (complete with a protection score for each platform and tips to keep you safer), you can be sure that your internet identity is protected.

The post What Personal Data Do Companies Track? appeared first on McAfee Blog.

Google Prevented 2.28 Million Malicious Apps from Reaching Play Store in 2023

Google on Monday revealed that almost 200,000 app submissions to its Play Store for Android were either rejected or remediated to address issues with access to sensitive data such as location or SMS messages over the past year. The tech giant also said it blocked 333,000 bad accounts from the app storefront in 2023 for attempting to distribute malware or for repeated policy violations. "In 2023,

Avoid Making Costly Mistakes with Your Mobile Payment Apps

There used to be a time when one roommate split the cost of rent with another by writing a check. Who still owns a checkbook these days? Of course, those days are nearly long gone, in large part thanks to “peer to peer” (P2P) mobile payment apps, like Venmo, Zelle, or Cash AppNow with a simple click on an app, you can transfer your friend money for brunch before you even leave the tableYet for all their convenience, P2P mobile payment apps could cost you a couple of bucks or more if you’re not on the lookout for things like fraud. The good news is that there are some straightforward ways to protect yourself. 

You likely have one of these apps on your phone alreadyIf so, you’re among the many. It’s estimated that 49% of adults in the U.S. use mobile payment apps like these

Yet with all those different apps come different policies and protections associated with them. So, if you ever get stuck with a bum charge, it may not always be so easy to get your money back. 

With that, here are seven quick tips for using your P2P mobile payment apps safely.

1. Add extra protection with your face, finger, or PIN. 

In addition to securing your account with a strong password, go into your settings and set up your app to use a PIN code, facial ID, or fingerprint ID. (And make sure you’re locking your phone the same way too.) This provides an additional layer of protection in the event your phone is stolen or lost and someone, other than you, tries to make a payment with it.  

2. Get a request or make a test before you pay in full. 

What’s worse than sending money to the wrong person? When paying a friend for the first time, have them make a payment request for you. This way, you can be sure that you’re sending money to the right person. With the freedom to create account names however one likes, a small typo can end up as a donation to a complete stranger. To top it off, that money could be gone for good! 

Another option is to make a test payment. Sending a small amount to that new account lets both of you know that the routing is right and that a full payment can be made with confidence. 

3. You can’t always issue a “hold” or “stop payment” with mobile payment apps. 

Bye, bye, bye! Unlike some other payment methods, new mobile payment apps don’t have a way to dispute a charge, cancel a payment, or otherwise use some sort of recall or retrieval feature. If anything, this reinforces the thought above—be sure that you’re absolutely making the payment to the right person. 

4. When you can, use your app with a credit card. 

Credit cards offer a couple of clear advantages over debit cards when using them in association with mobile payment apps (and online shopping for that matter too). Essentially, they can protect you better from fraud: 

  • Debit cards immediately remove cash from your account when a payment is made, whereas credit card payments appear as charges—which can be contested in the case of fraud. 
  • In the U.S., if your credit card is lost or stolen, you can report the loss and you will have no further responsibility for charges you didn’t make. Additionally, liability for each card lost or stolen is $50. Debit cards don’t enjoy these same protections. 

5. Fraudulent charge … lost or stolen card? Report it right away. 

Report any activity like this immediately to your financial institution. Timing can be of the essence in terms of limiting your liabilities and losses. For additional info, check out this article from the Federal Trade Commission (FTC) that outlines what to do if your debit or credit card is stolen and what your liabilities are.  

Also, note the following guidance from the FTC on payment apps: 

“New mobile apps and forms of payment may not provide these same protections. That means it might not always be easy to get your money back if something goes wrong. Make sure you understand the protections and assurances your payment services provider offers with their service.”  

6. Watch out for cybercrooks cashing in on mobile payment app scams. 

It’s sad but true. Crooks are setting up all kinds of scams that use mobile payment apps. A popular one involves creating fake charities or posing as legitimate ones and then asking for funds by mobile payment. To avoid getting scammed, check and see if the charity is legit. The FTC suggests researching resources like Better Business Bureau’s Wise Giving Alliance, Charity Navigator, Charity Watch or,  GuideStar. 

Overall, the FTC further recommends the following to keep yourself from getting scammed: 

  • Review the app’s fraud protection policies and understand whether and how you can recover funds if a problem arises. 
  • Be wary of any business that only accepts P2P payment apps or pre-paid debit card payments. Consider this a red flag. 
  • Never send P2P payments to, or accept payments from, someone you don’t know. 
  • Don’t use P2P payment apps for purchasing goods or services. As noted above, you may not get the consumer protections a credit or debit card can offer. 

7. Protect your phone 

With so much of your life on your phone, getting security software installed on it can protect you and the things you keep on your phone. Whether you’re an Android owner or iOS owner, mobile security software can keep your data, shopping, and payments secure. 

The post Avoid Making Costly Mistakes with Your Mobile Payment Apps appeared first on McAfee Blog.

Malicious Ads on Google Target Chinese Users with Fake Messaging Apps

Chinese-speaking users have been targeted by malicious Google ads for restricted messaging apps like Telegram as part of an ongoing malvertising campaign. "The threat actor is abusing Google advertiser accounts to create malicious ads and pointing them to pages where unsuspecting users will download Remote Administration Trojan (RATs) instead," Malwarebytes' Jérôme Segura said in a

Crypto Hardware Wallet Ledger's Supply Chain Breach Results in $600,000 Theft

Crypto hardware wallet maker Ledger published a new version of its "@ledgerhq/connect-kit" npm module after unidentified threat actors pushed malicious code that led to the theft of more than $600,000 in virtual assets. The compromise was the result of a former employee falling victim to a phishing attack, the company said in a statement. This allowed the attackers to gain

SpyLoan Scandal: 18 Malicious Loan Apps Defraud Millions of Android Users

Cybersecurity researchers have discovered 18 malicious loan apps for Android on the Google Play Store that have been collectively downloaded over 12 million times. "Despite their attractive appearance, these services are in fact designed to defraud users by offering them high-interest-rate loans endorsed with deceitful descriptions, all while collecting their victims' personal and

S3 Ep131: Can you really have fun with FORTRAN?

Loop-the-loop in this week's episode. Entertaining, educational and all in plain English. Transcript inside.

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