When I use a mobile phone, I get a security warning when I enter a site. Why is that?
Security Warning
The certificate on this website is invalid, which risks leaking your information. Do you still want to connect to the website?
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pu2. Technically, the site that uses the https protocol has its own certificate, which needs to be updated periodically. Also, the certificate must be issued by an authorized institution. It means that we are running an https site with a certificate that does not meet those requirements. Simply put, if it's a famous site, you can go in, but if it's not and you've received a link through text or Kakao Talk, you shouldn't go in.
2017-12-12
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