Possible to encrypt/password protect autogenerated emails?

We are a research project in its second year collecting clinician and patient data from a facility across the country. We already use auto-emails to let research staff know when a survey has been completed, but we'd like to also create an auto-email to send clinically critical information back to the treatment facility as soon as it's entered. Because it's clinically sensitive information attached to a date we'd need more than standard security. I'm an RN and this is pretty far outside my comfort zone. Thanks!