You probably know by now that using your mobile device on the public Wi-Fi network of your local coffee shop or airport involves some risk. Public networks aren’t very secure – or, well, private – making it easy for others to intercept your data. So, what can you do to keep your mobile data private and safe while on the go? Some consumers have started using Virtual Private Network (VPN) apps to protect the information on their mobile devices from prying eyes on public networks. Before downloading a VPN app, you should know that there are benefits and risks.
Basics of the VPN app
How do VPN apps work? When you use a VPN app, data sent from your phone ̵
Why would anyone use a VPN app? VPN apps offer different uses. Not only do some VPN apps promise to keep your information safe on public networks, but some also claim to keep your information private from advertisers and other third parties. And because VPN apps route your traffic through another network, they can make your traffic appear as if your traffic is coming from elsewhere. This is similar to how a company could use a VPN to allow employees to use their work computer as if they were on the corporate network, even while on the move.
What are some privacy and data security concerns when using a VPN app? First, you should be aware that when you use a VPN app, you allow the app to intercept all your internet traffic. You don’t want to give such consent lightly. A group of technical researchers who studied nearly 300 VPN apps (link is external) also discovered potential privacy and security risks with some VPN apps. For example, according to the study, some VPN apps did not use encryption; some asked for sensitive and possibly unexpected privileges; and some shared data with third parties for purposes such as injecting or displaying advertisements, or analyzing the data to see how people use a particular site or service.
Given these findings and the great confidence you should place in a VPN app with your traffic, here are some things to consider before downloading a VPN app.
Before downloading a VPN app
- Examine the VPN app before using it. You may trust all of your traffic on a VPN. Before downloading a VPN app, learn as much about the app as possible. Look up external reviews from sources you respect. You can also view screenshots, app description, content rating and user reviews, and do some online research about the developer. The fact that an app promises security or privacy doesn’t necessarily make it reliable.
- Carefully review the permissions the app is requesting. Apps display the permissions they request on their app store page, during installation, or when using the permission. It’s useful information that tells you what kinds of information the app can access on your device in addition to your internet traffic. If an app is requesting particularly sensitive permissions (reading text messages, for example), consider whether the permission makes sense given the purpose of the app and whether you trust the app developer providing access.
- Note that not all VPN apps actually encrypt your data. Some VPN apps use protocols that don’t encrypt your traffic or encrypt only part of your traffic. External reviews of sources you respect can provide more information about a particular app’s use of encryption.
- A VPN app will generally not make you completely anonymous. Instead, the app will typically hide the content of your traffic from your ISP or public Wi-Fi provider, shifting trust from those networks to the VPN app provider. In addition, sites you visit may be able to determine that you are using a VPN app, and can still use identifying information that you share directly with them (for example, filling out a form with your email address) to track you.