uses an invalid security certificate uses an invalid security certificate

Fix your connection is not private-net

Moxie Marlinspike revealed a vulnerability in a 2009 BlackHat Federal talk titled “New Tricks for Defeating SSL in Practice,” which prompted the creation of HSTS. The vulnerability that HSTS protects against is the one that Marlinspike’s SSLStrip tool illustrates.
If your browser has saved HSTS settings for a domain and you attempt to connect over HTTP or a broken HTTPS connection (hostname mismatch, expired certificate, etc.) you will get an error. HSTS-related errors, unlike other HTTPS errors, cannot be avoided. This is due to the browser receiving explicit instructions from the browser to only allow secure connections.
The “max-age” option in the HSTS settings tells the browser how long to cache and remember the settings before checking them again. To get past the error right away, you’ll need to clear your browser’s local HSTS settings for that domain. The steps to do so are listed below.
In each browser, these settings must be cleared. If you are testing a HSTS configuration as a developer, you may encounter this error. This error can be seen on localhost in Chrome. Depending on the size of your audience, it may be impossible to correct errors once HSTS has been deployed to a live site for end users. Each user must either delete or wait for their local HSTS settings to expire according to the ‘max-age’ that was set.

How to fix ‘this site can’t provide a secure connection

If this is a personal computer, you can turn off the security feature right away. OEMs are also known to send forged certificates in order to provide aftermarket services; in some cases, these forged certificates have been used to install signed malware because the OEMs are unable to properly secure their products.
Because Firefox was quietly rejecting the connection for a similar reason, it was trying to instantiate that connection using a similar forged certificate, you were unable to upgrade Firefox via the upgrade system. In other words, you’re still using the forged certificate, even though you corrected the problem mentioned in your question, and you might as well be sending everything over plain text.

Error message – there is a problem with this website’s security

For both website owners and users, nothing is more aggravating than receiving an SSL certificate error. If you’re certain you’ve followed all of the steps for installing your SSL certificate but Chrome still tells you something’s wrong with your site’s security, it’s tempting to give up.
It’s inconvenient for users to try to access a site only to be greeted with the “Your Connection Is Not Private” message and the “Not Secure” warning in the address bar, especially if the site appeared to be secure earlier that day. It is important to note that this message is intended to protect you and is, in most cases, correct. However, there may be a problem on the user’s end that causes this warning to appear.
If none of these solutions work, it’s most likely a problem with the website’s SSL certificate, as described in the previous section. You would also get one of the following messages in this case:

How to fix net::err_cert_date_invalid privacy error

SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are cryptographic protocols that allow clients and servers to communicate securely over the internet. TLS is a newer version of SSL, which is an older cryptographic protocol. The purpose of obtaining an SSL/TLS certificate was to determine the identity of the remote server with whom the client browser communicated, not just for authentication. Consider the following scenario: your browser is communicating with, and the website’s SSL/TLS certificate is valid. This tells us two things:
Of course, that was the intention. Fast forward to today, and approximately 50% of phishing websites now use an HTTPS connection to spam users. A domain is only supposed to be carefully vetted in terms of its identity with an EV SSL certificate. At the very least, because the company must be registered and the owner must pay for the EV certificate, there is transparency.

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