Whether you’re working at a library, checking email at an airport, or connecting to free Wi-Fi at a coffee shop, these shared computers and public Wi-Fi help millions of people stay connected every day. 

You’ve probably heard warnings that public Wi-Fi is dangerous and should be avoided. While public networks carry some risks, many older warnings are outdated or exaggerated. Today, most websites and apps use encryption automatically, and modern devices are much better at protecting users than they were years ago. 

However, this isn't a green light to ignore security altogether. The biggest risks on public networks today often come from scams, fake login pages, weak passwords, or careless device habits, not hackers secretly intercepting every message you send over café Wi-Fi.

Are public Wi-Fi networks safe? 

Public Wi-Fi is generally safer than many people assume. Most websites now use HTTPS encryption, which helps protect your information as it travels across the internet. Modern browsers also warn users about suspicious or insecure websites, and operating systems have improved their security protections. 

However, risks still exist. Criminals may try to: 

• Create fake Wi-Fi hotspots with names similar to legitimate networks 

• Trick you into entering credentials on fake login pages 

• Spread malware through malicious downloads or phishing 

• Exploit outdated or poorly secured devices (like those not protected by multifactor authentication) 

• Physically observe screens or keyboards in crowded spaces 

The key is not avoiding public Wi-Fi entirely, but to use it – and the internet – wisely.  

If you are sketched out by public Wi-Fi, use your smartphone or a cellular hotspot for a secure connection – contact your wireless provider for more information. 

Staying safe on public computers 

Computers in libraries, schools, hotels, and business centers are shared devices. Because many people use them, always assume they are less secure than your personal laptop or phone. 

Avoid sensitive activities 

Try not to use public computers for highly sensitive tasks such as:

• Banking or financial accounts 

• Medical records 

• Shopping with saved payment information 

• Work systems with confidential data 

Don’t save your information 

When using a shared computer, never agree if the browser prompts you to save personal information:

• Passwords 

• Payment information 

• Autofill data 

• Login sessions 

Always uncheck the “Remember Me” or “Stay Signed In” boxes when logging into websites. 

These features are convenient on your personal devices, but risky on shared systems where strangers may use the computer after you. 

Log out completely 

Closing a window is not enough. Many websites keep users signed in unless they actively log out.

Before leaving a public computer: 

• Log out of all accounts you accessed 

• Close all browser tabs and windows 

• Delete any files or data you downloaded to the machine (and empty the recycling bin!)

Taking an extra minute to log out properly can prevent someone else from accessing your accounts. 

Clear browsing data

After using a public computer, clear the browser’s:

• Browsing history 

• Cookies 

• Cached files 

• Saved form data 

Most browsers include these options in the Settings or Privacy menu. 

This step helps remove traces of your activity and further reduces the chance that another user could access your information. Using a private or incognito browsing window can automatically delete this data, too.

Watch out for fake Wi-Fi networks

Cybercriminals have been known to create fake hotspots with names designed to look legitimate, such as:

• “Airport Free WiFi”

• “CoffeeShop_Guest”

• “Hotel Lobby WiFi”

Before connecting, confirm the correct network name with staff or posted signage.

Avoid networks that require unexpected downloads, ask for excessive personal information, or trigger strange browser warnings.

Cybersecurity best practices help you stay safe online in public 

The best way to protect yourself using public Wi-Fi or public computers is to adopt the most effective security behaviors: 

• Every password should be at least 16 characters long, unique to the account, and a random string of characters – use a password manager to store them all! 

• Keep your software updated, especially your operating system. 

• Enable multifactor authentication (MFA) for every account to significantly increase protection. 

• Be suspicious of any unexpected and urgent inbound message – this includes emails, phone calls, texts, and social media posts.

Be aware of your surroundings

Cybersecurity isn’t only digital. In public places, someone nearby may be able to "shoulder surf" and: 

• Read sensitive information on your screen 

• Watch you enter passwords 

• View personal messages or financial details 

To combat prying eyes, lower your screen brightness, use a privacy screen, or position yourself carefully (like having a wall behind you) when handling sensitive information in public.

Do you need a VPN? 

VPNs are often advertised as essential for public Wi-Fi security, but the reality is more nuanced. Because most modern websites and apps already use encryption, a personal VPN usually offers limited additional protection for the average user browsing the web. A VPN is not an antivirus or cybersecurity silver bullet, and it won't protect you from falling for fake messages or weak passwords.

Good habits make for public Wi-Fi and shared computer safety  

Public computers and public Wi-Fi are part of our everyday life. You do not need to avoid them to stay safe online. By following our basic security recommendations, you reduce your chances of being victimized. For more cybersecurity tips, sign up for our free email newsletter!

FAQs

Is public Wi-Fi safe to use?

Public Wi-Fi is generally safer than it used to be because most websites and apps now use encryption.

Should I avoid banking on public Wi-Fi?

If possible, use your cellular connection or wait until you’re on a trusted network for sensitive activities like banking.

Do I need a VPN for public Wi-Fi?

Most people do not need a VPN for everyday browsing on public Wi-Fi because modern websites already encrypt traffic.

What should I do after using a public computer?

Never save passwords or payment information on a shared device. Log out of all accounts, close browser windows, and clear the browsing history, cookies, and cached data before leaving the computer.