Few days back, I was installing Linux on my computer after completing the installation process when I booted back to Windows and open https website- PayPal, found that the browser saying that it is an Untrusted Connection.
Although we know that https are secured connection as compared to http and uses SSL port 443 to secure website connection and web-sites, like PayPal uses a SSL certificate then why I am getting this error message.
I was left with only one option and that was to understand the risk of using an Unsecured Connection to do my work and add a security exception. I added the exception and did my work. Later on when I checked my computer time (system time) it was showing something else then what it should be and also the time zone (G.M.T.) was different.
From the control panel, I set back the correct time and date and when I visited PayPal site again it was not showing that Untrusted Connection error message. After that to understand better; why I was getting that error message previously, I learnt in depth about the https (Hypertext Transfer Protocol Secure) and SSL (Secured Socket Layer).
From my research, I found that only in two cases user will get this kind of error messages. The first one is when a SSL certificate company has not updated the certificate license, for example: PayPal uses https connection and the SSL Certificate is provided by VeriSign with 256-bit AES encryption.
Once a company assigns a certificate to a website then it must be validated before the expiry date of it and failing to which the connection to that website becomes unsecured and user will start getting messages like Untrusted Connection and after that if he wants to access the site then he has to add a security exception.
The second case in which user will get this kind of messages when the system time/date of the computer is different than the real time. Correct system time/date is important because the browser via which user is accessing HTTPS sites, it uses the system time/date according to the time zone to validate the SSL certificate of the website which you are accessing and if the date/time does not matches then it will show the error message.
Only in these two cases, user can get error messages while accessing (HTTPS) Hypertext Transfer Protocol Secure websites. However, if the site is hacked then also user may get this kind of error messages but hacking a https site is near to impossible and if in case it happens then it can be done only by DDoS attack. So, if you are getting this kind of error message then follow the above guide to solve the error.
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