Hi there,
Milos here from the ManageWP team. Thank you for reaching out.
Yes, these .pub files in the wp-content/plugins/worker/publickeys/ directory are a normal part of the installation and nothing to be concerned about.
However, if you do have other indications that someone may have accessed your website without authorization, please feel free to open a support ticket at helpdesk@managewp.com and one of our agents will take a closer look at it.
Kind regards,
