The reason for this prompt, one is the problem of the website, but the problem of their own computer, the site of the problem we can not change, we could try to repair their own computer may exist problems.
First, check the computer time
Check to see if the time and date are correct in the lower right corner of the computer, and if not, click the "Change date and Time settings" correction.
Second, the installation of Web site certificate
If the Web site (for example, 12306) has provided a security certificate, downloading and adding a security certificate resolves this issue, and the following steps are added:
1, download the certificate provided by the Web site, generally a. cer format file, double-click and open this certificate. Or click the "View Certificate" button in the pop-up prompt window:
2, pop-up certificate information, click the installation certificate
3, click "Next"
4, select "Put all the certificates in the following storage", click "Browse":
5. In the pop-up window, select "Trusted Root certification Authority" and click "Confirm"
6, continue to click "Next"
7, click "Finish"
8. Prompt Import Success
9, restart the browser, and visit the site again.