There is a security warning on my smartphone, why is that?

A. 1

I watched it from time to time, but it works well even if I just use it kk

Gentleman 8 years ago 0

OK

A. 2

Technically, sites that use the https protocol have their own certificates, which must be updated periodically.
Also, you need to get a certificate from an authorized institution.
This means that you are running an https site with a certificate that does not meet those requirements.
To put it simply, if it's a famous site, you can go in,
Otherwise, if you got the link via text or Kakao Talk,
It's better not to go in.

Gentleman 8 years ago 0

OK