\label{section:PKIs}
Public-Key Infrastructures aim to provide a way to simplify the verification of
-a certificates trustworthiness. For this, certificate authorities (CAs) are
+a certificate's trustworthiness. For this, certificate authorities (CAs) are
used to create a signature chain from the root CA down to the server (or client).
Accepting a CA as a generally-trusted mediator solves the trust-scaling problem
at the cost of introducing an actor that magically is more trustworthy.
This section deals with settings related to trusting CAs. However, our main
-recommendations for PKIs is: if you are able to run your own PKI and disable
+recommendation for PKIs is: if you are able to run your own PKI and disable
any other CA, do so. This makes sense most in environments where any machine-to-machine
communication system compatibility with external entities is not an issue.
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