I was recently reviewing the information about two Drupal modules for improving site security: the Hacked module and the Security Kit (SecKit) module. I was wondering, specifically for a website posted on Pantheon, if Pantheon support engineers (or other Pantheon Drupal users) have any recommendations about using these modules (or other security-improving modules) on a Drupal 10 website. There aren’t any specific recommendations in the Security section of the Pantheon documentation, but that might be intentional.
Drupal site security on Pantheon: recommended modules
Hey @aaron! Thanks for popping in here to ask. 
I am going to check in with some of my team members on this for you. Hang tight!