Are VPNs safe? What makes a VPN secure?

Are VPNs safe?

VPNs are mostly safe, legal, and available to anyone who wants to protect the data they send over the internet — but only if you use a reliable VPN provider. 

When you use a VPN, your data travels through the VPN server, where it gets encrypted before heading to its final destination. This encryption ensures your information stays private and away from prying eyes. A premium VPN provider encrypts your data securely, sends it swiftly so you don’t notice any slowdown, and doesn’t keep logs of your online activity. 

NordVPN is known as one of the most secure VPN services because it not only meets all of the above standards but also offers advanced tools for extra protection. Strong NordVPN security has been proven by independent assessments, including the most recent ones like the NordVPN app security test by Cure53 and the AV-Comparatives anti-phishing test that assessed  NordVPN’s Threat Protection Pro™ solution.

These external audits serve as essential validation, but in reality, they just confirm what we have already established internally. Audits don’t create security — they only confirm it. True safety comes from the architecture itself, meaning it must be built into the code from day one, not fixed later.

That is why at NordVPN, we don’t just release a feature because it sounds good on paper. We only launch technology after it has survived our own rigorous internal stress-testing. If the engineering doesn’t hold up, the product doesn’t go out to the public.

So what can you do? Don’t just take a company’s word for it — verify. I encourage every user to actually look for these public audit summaries. If a VPN provider claims to be secure but isn't willing to show you independent proof, you shouldn’t trust it with your data.

Do VPNs really work?

VPNs really work in terms of improving online privacy and security. For example, if you use unsecured public Wi-Fi, a VPN prevents snoopers from seeing what you’re doing online.

Imagine you’re working on your laptop in a coffee shop, connected to the public Wi-Fi. Without a VPN, anyone on the same network could potentially snoop on your online activity — they could read your emails or even steal login credentials. With a VPN, your internet connection is encrypted, making it almost impossible for malicious actors to see what you’re doing, even if they’re on the same Wi-Fi network.

VPNs also work wonders when you travel. While abroad, you might want to unwind by watching the content you’re used to at home. Without a VPN, that content could be blocked because you’re in a different country. But with a VPN, you can easily switch your virtual location and enjoy your favorite TV series as if you were back home.

Do VPNs prevent hackers from accessing your information?

A VPN does not stop hackers from accessing your information entirely. A VPN protects your data from hackers mainly while it travels between your device and the internet.

When you connect to unsecured Wi-Fi in places like airports, cafes, or hotels, hackers on the same network can intercept your traffic and steal sensitive information like login details or credit card numbers. A VPN encrypts your connection, turning your data into unreadable code and adding a layer of protection from snoopers.

Another common risk is man-in-the-middle attacks. In this type of attack, hackers secretly intercept and can even alter communication between you and the website or app you’re using. A VPN helps prevent this by securing your connection and encrypting the data you send and receive, making it extremely difficult for anyone to tamper with it.

Keep in mind that while a VPN is a strong shield for your data in transit, it won’t protect you if you download malware, click suspicious links, or fall for phishing scams. Good online security always combines the right tools with smart online habits.

Do VPNs keep your online activity safe from your ISP?

A VPN does not completely hide everything from your internet service provider (ISP), but a VPN blocks the ISP from seeing what websites you visit or what data you send and receive.

Without a VPN, your ISP can see every website you open, every app you use, and sometimes even what you’re doing inside them. When you connect to a VPN, your traffic goes through an encrypted tunnel, so your ISP can only see that you’re connected to a VPN server — not what you’re doing beyond that.

This means your ISP can’t monitor or log your browsing history, track which streaming services you use, or throttle your speed based on your online activities. For example, if you’re streaming videos or downloading large files, some ISPs slow down your connection to manage network traffic. A VPN hides this traffic, making it much harder for your ISP to target specific activities.

Do VPNs protect against DNS leaks and IP exposure?

A VPN does not automatically protect you from all DNS leaks or IP exposure if it’s not set up correctly, but a good VPN like NordVPN has built-in features to prevent them. When you use the internet without a VPN, your device usually uses your ISP’s DNS servers to translate website names into IP addresses, which can expose what sites you visit. A DNS leak happens when this DNS request bypasses your VPN tunnel and goes straight to your ISP.

A reliable VPN routes all your traffic, including DNS queries, through its own secure servers. This technology keeps your real IP address and browsing activity shielded from your ISP and other third parties. If your VPN connection drops, a kill switch stops your internet traffic to avoid accidental leaks.

To make sure you’re protected, run a quick DNS leak test using NordVPN’s free tool.

Do VPNs make you anonymous?

A VPN does not make you anonymous — there’s no true anonymity online. A VPN changes your IP address and encrypts your traffic, which improves privacy but doesn’t make you invisible. The topic of VPN anonymity has been debated for years, but the truth is that while a VPN keeps your browsing private, you still leave traces when you log in to accounts or share personal details.

What makes a VPN secure?

Choosing the right VPN requires understanding the specific features that make it trustworthy.

1. Strong encryption

A high-quality service uses VPN encryption like AES-256, known for its virtually unbreakable level of protection. This technology provides a secure connection even on public networks.

2. Secure VPN protocols 

Security-conscious VPNs use secure protocols to ensure a stable and safe connection. The WireGuard VPN protocol has become the new industry standard because it strikes a great balance between speed and security.

However, the standard version had privacy limitations we weren’t comfortable with, which is why we engineered NordLynx to deliver WireGuard’s benefits without compromising our customers’ privacy.

3. Key management 

Effective management of encryption keys is crucial for security, and one of the best approaches is a system called perfect forward secrecy. It ensures that each session creates a unique key, so even if one key is compromised, it won’t impact past or future sessions.

4. No tracking of your online activity

A trustworthy service shouldn’t track what you do online, meaning it doesn’t store information about your online activity.

5. Account security

Multi-factor authentication (MFA) gives your account an extra layer of protection. Reliable VPNs also take server security and authentication seriously to keep your credentials and information safe.

6. Secure server infrastructure 

A dependable VPN relies on a solid server setup to keep user data secure. Key elements of this include:

• RAM-only servers. These servers don’t use traditional hard drives. Instead, all data is stored in volatile memory that wipes clean when powered off, reducing data retention risks.
• Colocated servers. VPN providers that own and fully control their server hardware (rather than renting from third parties) have tighter oversight of server security, limiting vulnerabilities from external access or tampering.

7. Third-party security audits 

Regular audits from third-party firms confirm that the provider adheres to its privacy policies and has strong security practices. Reputable providers share audit reports publicly, building trust with users.

8. Code audits 

Some VPNs encourage penetration testers, cybersecurity researchers, or even advanced users to test for vulnerabilities. For example, you’ll find Nord Security on the HackerOne platform, where any expert can help identify potential security issues.

What VPN benefits keep you safe and private online?

Using a VPN helps secure your entire digital experience. Here’s how the benefits of a VPN can keep you safe and private whenever you go online.

• Data encryption. A VPN encrypts your internet traffic, making it unreadable to anyone who might intercept it, including hackers, your ISP, or even government agencies.
• IP address protection. VPNs change your real IP address, creating a layer of privacy that stops sites and trackers from identifying your virtual location and ISP. When you connect to a VPN, they see only the IP of the VPN server.
• Secure public Wi-Fi. VPNs are invaluable for public Wi-Fi use. Networks at cafes, airports, and hotels are vulnerable and often lack adequate protection. VPNs protect you from hackers who might be lurking on these networks. With the rise in remote work, VPNs also provide an essential security layer for remote users accessing company networks.
• Secure access to content. A VPN masks your real IP address and routes your connection through a secure server, letting you access websites and information as if you’re browsing from another location. This encrypted tunnel keeps your activity private and protects your data from snooping or blocking by networks and third parties.
• Protection from online tracking. VPNs help prevent tracking by websites, advertisers, and search engines by masking your IP address and using encryption to obscure your online activity. NordVPN also offers an advanced online protection solution — Threat Protection Pro™ that includes a tracker blocker that prevents third parties from tracking your browsing activity.
• Connection drop protection. NordVPN’s Kill Switch automatically cuts off your internet if the secure VPN connection drops unexpectedly, preventing your data from leaking and keeping your information safe until the connection is restored.
• Protection against DDoS attacks. A DDoS attack floods your IP address with fake traffic to slow down or crash your connection. When you use a VPN, your real IP stays hidden because your traffic goes through a secure VPN server — so attackers hit the VPN server instead of you, keeping your connection stable.
• Safer online transactions. While a VPN doesn’t directly secure the payment systems of banks or online services, it does encrypt your internet connection, which can protect you from hackers when using public Wi-Fi. It also shields your IP address, reducing the risk of attacks or fraud while you’re browsing or making purchases. However, the key to secure transactions still lies in using trusted services with strong security measures.
• Protection from cybersecurity threats. Some VPNs offer built-in malware protection, which can block access to known malicious websites or prevent downloads of harmful files. NordVPN’s Threat Protection Pro™ includes a whole set of security and privacy tools like an ad blocker, a tracker blocker, and malware protection. According to internal research, Threat Protection Pro™ stops as many as 43.2 billion trackers per month.

Are there any dangers in using a VPN?

While VPNs are generally safe, some free VPNs, compared to paid VPN providers, may lack certain key features that premium VPNs offer for better security and privacy. Here are a few possible concerns:

1. 1.Potential data leaks. Some free VPN services may have weak security that could expose your data during your connection.
2. 2.Outdated protocols. Free VPNs might use outdated encryption methods, which makes it easier for hackers to crack your security.
3. 3.Legal consequences. Using a VPN to bypass government restrictions or access prohibited content can have legal repercussions, especially in countries where VPN use is restricted or monitored. This could result in fines or other legal issues.
4. 4.Data interception by a VPN provider. While VPNs encrypt your internet traffic, your data still passes through the provider’s servers. If the provider is untrustworthy, logs user activity, or uses weak encryption protocols, your data could be accessed, logged, or exposed during transmission, compromising your privacy.

When shouldn’t I use a VPN? When it violates local laws or regulations in countries like China, Russia, United Arab Emirates (UAE), Iran, Turkey, Oman, North Korea, Belarus, Turkmenistan, and Ethiopia, using a VPN could have legal consequences. Always check local laws to ensure you're compliant.

Even though VPNs are legal to use in most countries, we recommend visiting this guide on VPN bans to learn more.