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What is a VPN?
A VPN, or virtual private network, is a secure tunnel between your device and the internet. VPNs protect you from online snooping, interference, and censorship.
A VPN (virtual private network) is the easiest and most effective way for people to protect their internet traffic and keep their identities private online. As you connect to a secure VPN server, your internet traffic goes through an encrypted tunnel that nobody can see into, including hackers, governments, and your internet service provider.
Consumers use VPNs to keep their online activity private and ensure access to sites and services that might otherwise be restricted.
Companies use VPNs to connect far-flung employees as if they were all using the same local network at a central office, but with fewer benefits for individuals than a personal VPN.
Benefits and advantages of VPN
Change your location
Using a VPN changes your IP address, the unique number that identifies you and your location in the world. With a new IP address, you can browse the internet as if you were in the UK, Germany, Canada, Japan, or virtually any country, if the VPN service has servers there.
Protect your privacy
Changing your IP address with a VPN helps shield your identity from websites, apps, and services that want to track you. Good VPNs also prevent your internet provider, mobile carrier, and anyone else who may be listening from seeing your activity, thanks to a layer of strong encryption.
Increase your security
Using a VPN protects you from security breaches in many forms, including packet sniffing, rogue Wi-Fi networks, and man-in-the-middle attacks. Travelers, remote workers, and all kinds of on-the-go individuals use a VPN whenever they’re on an untrusted network like free public Wi-Fi.
Unblock websites
If you’re in a part of the world that restricts access to Google, Wikipedia, YouTube, or other sites and services, using a VPN will let you regain access to the free internet. You can also use a VPN to break through firewalls on school or office networks.
When should I use a VPN?
If privacy is important to you, you should use a VPN every time you connect to the internet. A VPN app runs in the background of your device so it won’t get in the way while you use other apps, stream content, and browse the internet. And you’ll have peace of mind knowing your privacy is always protected.
But here are some situations in which a VPN is especially useful:
- While traveling: Exploring the world doesn’t mean you have to change the way you use the internet. A VPN lets you use the internet as if you were still in your home country, no matter how far you travel.
- While traveling: Exploring the world doesn’t mean you have to change the way you use the internet. A VPN lets you use the internet as if you were still in your home country, no matter how far you travel.
- While on public Wi-Fi: Connecting to public Wi-Fi hotspots like those in cafes, airports, and parks could leave your private information vulnerable. Using a VPN on your devices keeps you safe with strong encryption.
- While gaming: Using a VPN unlocks games, maps, skins, and other add-ons that might be restricted on your network. It also shields you from DDoS attacks and reduces ping and overall lag.
- While file-sharing: P2P file sharing usually means that strangers can see your IP address and possibly track your downloads. A VPN keeps your IP address private, letting you download with increased anonymity.
- While shopping: Some online stores show different prices to people in different countries. With a VPN, you can find the best deals in the world no matter where you’re shopping from.
How does a VPN work?
To understand how a VPN works, it helps to first understand how your internet connection works without one.
Without a VPN
When you access a website without a VPN, you are being connected to that site through your internet service provider, or ISP. The ISP assigns you a unique IP address that can be used to identify you to the website. Because your ISP is handling and directing all your traffic, it can see which websites you visit. And your activity can be linked to you by that unique IP address.
With a VPN
When you connect to the internet with a VPN, the VPN app on your device (also called a VPN client) establishes a secure connection with a VPN server. Your traffic still passes through your ISP, but your ISP can no longer read it or see its final destination. The websites you visit can no longer see your original IP address, only the IP address of the VPN server, which is shared by many other users and changes regularly.
Here are several key concepts related to VPN that will help you understand how a VPN works and the benefits it provides:
Proxying
The VPN server acts like a proxy, or stand-in, for your web activity: Instead of your real IP address and location, websites you visit will only see the IP address and location of the VPN server.
This makes you more anonymous on the internet.
Authentication
Establishing a secure connection is a tricky problem solved by clever mathematics in a process called authentication.
Once authenticated, the VPN client and VPN server can be sure they are talking to each other and no one else.
Tunneling
VPNs also protect the connection between client and server with tunneling and encryption.
Tunneling is a process by which each data packet is encapsulated inside another data packet. This makes it harder for third parties to read in transit.
Encryption
Data inside the tunnel is also encrypted in such a way that only the intended recipient can decrypt it. This keeps the contents of your internet traffic completely private. Even your internet service provider won’t see it.
How do I choose a VPN?
The most important quality to consider when choosing a VPN service is trust. A trustworthy VPN provider:
- is transparent in its privacy policy
- has been independently audited
- designs its systems to avoid storing personal data
- shows a consistent commitment to internet privacy and digital freedom
Thereafter, choose your VPN based on the features you need, such as VPN server locations, compatibility with all the devices you own, and unlimited bandwidth.
Are VPNs legal?
VPNs are legal, and they are consistently used by individuals and companies around the world to protect their private information and online activity, including in countries with highly restrictive governments. Even where VPNs are seen as discouraged, many governments tacitly endorse their use by officials, academics, or business leaders as a necessary measure to stay competitive in an interconnected world. It is not practical for any country to ban all VPNs.
Having said that, illegal online activity remains illegal, whether you are using a VPN or not.
