-PuTTY records the host key for each server you connect to, in the
-Windows \i{Registry}. Every time you connect to a server, it checks
-that the host key presented by the server is the same host key as it
-was the last time you connected. If it is not, you will see a
-warning, and you will have the chance to abandon your connection
-before you type any private information (such as a password) into
-it.
+PuTTY \I{host key cache}records the host key for each server you
+connect to, in the Windows \i{Registry}. Every time you connect to a
+server, it checks that the host key presented by the server is the
+same host key as it was the last time you connected. If it is not,
+you will see a warning, and you will have the chance to abandon your
+connection before you type any private information (such as a
+password) into it.