No public Wi-Fi network is absolutely secure.
Wi-Fi network that pops up on your phone in a shopping mall, or a network operated by a third party that you've never heard of. These may well be legit, but if any passerby can hook up for free, what's the benefit for the people running the network? How are they making money? There's no hard or fast rule to apply, but using a bit of common sense doesn't hurt.
FOLLOWING ARE THE IMPORTANT POINTS TO KEEP IN MIND WHILE USING PUBLIC WIFI.
1 Treat all Wi-Fi links or spots with suspicion
Don’t just assume that the Wi-Fi link is legitimate. It could be a bogus link that has been set up by a cybercriminal that’s trying to capture valuable, personal information from unsuspecting users. Question everything — and don’t connect to an unknown or unrecognised wireless access point.
2 Use a VPN
By far the most effective trick for staying safe on public Wi-Fi is to install a VPN or Virtual Private Network client on your devices. It encrypts data traveling to and from your laptop or phone, and hooks you up to a secure server—essentially making it harder for other people on the network, or whoever is operating the network, to see what you're doing or grab your details.
3 Stick With HTTPS
Dont use an unencrypted HTTP connection rather than use an encrypted HTTPS encryption you get to know by seeing on top left labeling in the browser the former "Not Secure." Heed that warning. Especially on public Wi-Fi when you browse over HTTPS, people on the same Wi-Fi network as you can't snoop on the data that travels between you and the server of the website you're connecting to. Over HTTP? It's relatively easy for them to watch what you're doing.
4 Avoid using specific types of website
It’s a good idea to avoid logging into websites where there’s a chance that cybercriminals could capture your identity, passwords or personal information — such as social networking sites, online banking services or any websites that store your credit card information.
5 Limit AirDrop and File Sharing
When you're on a public network around strangers, you'll want to cut off the features that enable frictionless file sharing on your devices. On a PC, that means going to Network and Sharing Center, then Change advanced sharing settings, then Turn off file and printer sharing. For Macs, go to System Preferences, then Sharing, and unselect everything. Then head to Finder, click on AirDrop, and select Allow me to be discovered by: No One. For iOS, just find AirDrop in the Control Center and turn it off. And voila!. No one nearby can grab your files, or send you one you don't want.
6 Consider using your mobile phone network internet.
If you need to access any websites that store or require the input of any sensitive information — including social networking, online shopping and online banking sites — it may be worthwhile accessing them via your mobile phone network, instead of the public Wi-Fi connection.
References https://www.wired.com/
References https://www.kaspersky.co.in/
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