Server Features » TLS Certificate » Unknown CA » charybdis

TLS certificate status: Unknown CA

Percentage of SSL/TLS servers with certificate status Unknown/non-trusted Certificate Authority. Showing percentages for charybdis 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 charybdis servers only.
Version Sep 2017Dec 2018Dec 2019Dec 2020Dec 2021
3.4 7% 13% 17% 33% 14%
3.5 12% 6% 5% 5% 15%
4.0 0% 0% 0% 0% 100%
4.1 0% 17% 10% 16% 31%
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