Public Wi-Fi Safety for Seniors: How to Stay Secure Online When You Are Away From Home

What Is Public Wi-Fi and Why Is It Risky?

Public Wi-Fi refers to wireless internet networks that are available to anyone in a particular location, typically without needing a password specific to your account or, in many cases, any password at all. These networks are found in cafes, restaurants, hotels, airports, libraries, shopping centres, and an increasing number of other public spaces. They are often free to use and provide convenient internet access when you are away from home.

The convenience of public Wi-Fi comes with a significant security trade-off. Unlike your home network, which you control and secure with a password, public Wi-Fi networks are shared with anyone in the vicinity. This creates several categories of risk that are worth understanding before connecting to any public network.

The most fundamental risk is interception. Data transmitted over an unencrypted public Wi-Fi network can be observed by anyone else on the same network using readily available software. This means that if you send or receive unencrypted information, such as logging into a website that does not use HTTPS encryption, the content of that communication can potentially be read by other people connected to the same network.

A second risk is the evil twin attack, in which a fraudster creates a Wi-Fi network with a name similar or identical to a legitimate public network. When you connect to it, you are connected to the fraudster's network rather than the genuine one, allowing them to observe all of your internet traffic and potentially intercept login credentials or redirect you to fraudulent versions of websites.

A third risk is malware distribution. In some cases, connecting to a compromised public network can expose your device to malicious software that is distributed through the network connection itself.

Who Is Most at Risk?

Anyone who uses public Wi-Fi to access accounts or transmit personal information is at some level of risk. Older adults who are not familiar with the distinction between secure and insecure connections, or who may not have applied the most recent security updates to their devices, face somewhat higher risk because they may not recognise when they are in a vulnerable situation.

The activities that create the greatest risk on public Wi-Fi include online banking and financial transactions, accessing email accounts, logging into any account with a username and password, shopping online and entering payment card details, and accessing sensitive personal information such as medical records or government accounts. Each of these activities involves transmitting information that would be valuable to a fraudster if intercepted.

Conversely, general browsing of news websites, streaming video content, or using applications that do not require account login are lower-risk activities on public Wi-Fi, though not entirely risk-free.

What to Avoid on Public Wi-Fi

The simplest and most effective rule for public Wi-Fi safety is to avoid any activity that involves sensitive information. This means:

Never access online banking, investment accounts, or any financial platform on a public Wi-Fi network. Even if the banking website uses HTTPS encryption, you are still exposed to the risks described above, and the consequences of a security breach involving financial accounts can be severe.

Avoid logging into email accounts on public Wi-Fi if possible, as email accounts contain a great deal of sensitive personal information and are often linked to account recovery for banking and other services. If your email is compromised, a fraudster may gain access to password reset emails for your bank and other important accounts.

Avoid online shopping on public Wi-Fi, as entering credit or debit card details over an unsecured connection exposes your payment information to potential interception.

Avoid logging into accounts associated with sensitive personal information, including medical portals, government services, tax accounts, and pension platforms.

How to Identify a More Secure Connection

While no public Wi-Fi connection is as secure as your home network, some connections are meaningfully safer than others. A few indicators help you assess the security level of a public network.

Networks that require a password to join are marginally more secure than completely open networks, as they limit the pool of people who can monitor traffic on the network. However, a password requirement does not prevent the network operator or other connected users from potentially observing traffic, so a password alone is not a guarantee of security.

Websites that use HTTPS encryption, indicated by a padlock icon in the browser address bar, encrypt the data transmitted between your device and the website. This means that even if someone intercepts the data in transit, the content is encrypted and not directly readable. Most reputable websites now use HTTPS, but the padlock icon is worth checking before entering any sensitive information.

Hotel and airport networks with formal login portals, where you enter a room number or access code before connecting, are typically better managed than completely open networks, though they still carry the shared-network risks described above.

Using a VPN for Safer Public Wi-Fi

A Virtual Private Network, commonly called a VPN, is one of the most effective tools for improving security on public Wi-Fi. A VPN creates an encrypted tunnel between your device and a server operated by the VPN provider, routing all of your internet traffic through this tunnel. This means that even if someone intercepts your traffic on the public network, they see only encrypted data rather than the content of your communications.

VPNs are available as applications for smartphones, tablets, and computers. Reputable VPN services charge a modest monthly or annual subscription and are straightforward to use once set up: you open the application and connect before accessing the internet. The VPN then operates in the background for the duration of your session.

Choosing a reputable VPN provider is important. Look for providers with clear privacy policies, a stated policy of not logging user activity, and good independent security reviews. Free VPN services should be approached with caution, as some free providers generate revenue by collecting and selling user data, which undermines the privacy purpose of using a VPN.

For older adults who travel regularly and who need to access accounts while away from home, a VPN subscription is a relatively inexpensive and highly effective security investment. Setting it up with the help of a family member or tech-savvy friend before a trip removes the need to configure it under time pressure.

Using Your Mobile Data Instead

For many activities that would be risky on public Wi-Fi, using your mobile phone's cellular data connection is a significantly safer alternative. Mobile data is not transmitted over a shared network in the same way as Wi-Fi, and the cellular network has its own security architecture that is substantially more robust than unmanaged public Wi-Fi.

When you need to check your bank account, send an important email, or make a purchase while away from home, switching from Wi-Fi to mobile data for that specific activity provides meaningful additional security. You can do this easily on most smartphones through the settings menu.

If you are travelling internationally, check what data charges apply on your mobile plan before using cellular data abroad. Roaming charges can be significant on some plans. Many mobile providers offer affordable international data add-ons or day passes that activate when your phone connects to a foreign network, making this a practical option for most travellers.

Creating a personal hotspot using your mobile phone's cellular connection is another option. This turns your phone into a private Wi-Fi router that only your other devices connect to, rather than using a public network. Your laptop or tablet connects to your phone rather than to the public Wi-Fi, significantly reducing exposure to the risks described above.

Keeping Your Devices Secure

The security of your devices themselves is as important as the network you connect to. A device with outdated software, weak passwords, or no security software provides less protection regardless of the network it uses.

Keep your smartphone, tablet, and laptop software updated. Software updates frequently contain security patches that address vulnerabilities that could otherwise be exploited. Setting your devices to update automatically ensures these patches are applied without requiring you to remember to check manually.

Use a strong PIN, password, or biometric lock on all your devices. If a device is lost or stolen while travelling, a strong lock prevents immediate access to the personal information, accounts, and applications it contains.

Enable remote wipe functionality on your smartphone if it is available. This allows you to erase the data on your phone remotely if it is lost or stolen, preventing your information from being accessed by whoever finds or takes it.

Log out of accounts rather than simply closing the browser tab or application when you have finished using them, particularly on shared or public devices. A session that remains active can be accessed by the next person who uses the same device.

Recognising Suspicious Behaviour on Networks

Certain experiences while using public Wi-Fi may indicate that you are on a compromised network or that something unusual is occurring with your connection.

If you are redirected to unexpected login pages, asked to re-enter credentials for accounts you are already logged into, or see browser warnings about invalid security certificates, treat these as potential indicators of a compromised connection. Disconnect from the network immediately if you encounter these signs, particularly if you have already entered any sensitive information.

If your device behaves unusually after connecting to a public network, including unexpected slowness, applications opening themselves, or unusual battery drain, consider running a security scan with your antivirus software and, if concerns remain, consult a technical professional.