Server Features » TLS Certificate » Unknown CA » Nefarious

TLS certificate status: Unknown CA

Percentage of SSL/TLS servers with certificate status Unknown/non-trusted Certificate Authority. Showing percentages for Nefarious servers only.

About this test result: The certificate is signed by an unknown or non-trusted Certificate Authority. This will generate a certificate warning on the IRC client which the user will have to ignore. This is not secure as it allows a Man-in-the-Middle attack.
Note on statistics: there is a difference in the gathering of TLS servers between 2017-2019 and 2020-onwards, see SSL/TLS statistics on the data page.

Table

Percentage of SSL/TLS servers with certificate status Unknown/non-trusted Certificate Authority. Showing percentages for Nefarious servers only.
Version Sep 2017Dec 2018Dec 2019Dec 2020Dec 2021
2.0 0% 0% 0% 0% 10%
(Download JSON data set)