There is something fishy about free WIFI. How to do good network security?

More and more public places offer free WiFi. Looking for free WiFi when going out and "swiping your phone" is now the "biggest" habit of everyone. However, is free WiFi reliable? A few days ago, reminders about the leakage of personal information caused by using free Wi-Fi went viral in the circle of friends. Industry insiders suggest that when you go out, you should not use free WiFi without passwords, and try to use password-protected WiFi provided by reliable merchants. When sending and receiving emails, logging into Taobao or online banking, it is best to turn off WiFi and switch to 3G or 4G networks for data connections. . However, with increasing traffic demands, WiFi is still inevitable. what to do? In fact, using a VPN (virtual private network), you can build an encrypted data transmission tunnel yourself. Use VPN tools skillfully to prevent WiFi traps. I believe everyone knows before that you can buy VPN tools through the Taobao platform. In fact, many manufacturers now include VPN functions when providing traffic and App services. If you purchase a VPN server as a proxy, you can set the IP address on your mobile phone to surf the Internet more safely in a WiFi environment. Previously, UC Browser was the first to propose the concept of security and cloud. Users using UC to surf the Internet not only use asymmetric encryption for information transmission encryption, but also lead the industry in file download scanning, malware removal, WiFi security management, etc. However, this protection only works within the browser. In fact, previously, in the March 15 CCTV report, "hackers" easily obtained users' selfie photos, email accounts, and passwords because the information was transmitted in clear text and was not encrypted. However, when using a VPN, the user's online experience will be degraded, mainly because data transmission will be slower. "UC used to protect the security of users' free WiFi environments, and it could only be regarded as a front-end encryption method." UC President He Xiaopeng said frankly that the new version of UC Browser has added a light VPN plug-in in the middle to enhance the encryption performance. However, in order to better protect personal privacy and mobile device data security, I personally recommend that you try to choose more reliable VPN service providers at home and abroad. Professional matters should still be left to professionals. Bring your own VPN third-party defense tools In addition to purchasing VPN tools online or using a browser with a VPN, there are also some tools you can borrow. For example, VPN by SurfEasy, there are many similar apps (such as Express VPN and Vypr VPN) with an annual fee of about 300 yuan. In Opera Turbo 2.0, all unencrypted traffic of the mobile phone will pass through the Opera cloud server group. After a series of operations, the server group will transmit the traffic back to the mobile phone. This data will be transmitted through the SPDY protocol with default SSL encryption and in the more secure form of differential transmission. Unlike 360 Mobile Guard, which adds a VPN function to establish a "WiFi safe channel", Mobile Manager can scan WiFi hotspots to identify risky WiFi and recommend green and safe WiFi to users. However, although Mobile Guard is encrypted, it currently only encrypts payment applications by default, and other applications need to be manually added to the list. Security expert Tao Sinan said that data must pass through the router. The common solution is to first encrypt and build a secure tunnel, then pass through the router, and then decrypt it on the server side. Even if a "hacker" obtains the encrypted data, he or she cannot easily see the data transmitted by the user. According to industry insiders, when using VPN services, you should also choose services from well-known manufacturers to reduce "secondary risks."