Dryad requires an ORCID ID for login. If you do not have an ORCID, you will have the opportunity to create a free, unique, identifier for yourself at the login page. Dryad uses ORCID so they can authenticate each individual researcher regardless of your route of entry to Dryad (i.e. through the website, through the API, through a journal integration, etc.). When datasets are published, they should appear in your ORCID profile along with articles and other works.
Since TTU is an institutional member, Dryad requires a second form of authentication at login for campus single-sign-on. After you have logged in with your institutional credentials, Dryad ties together your ORCID and institutional affiliation so that you will not have to include this information a second time.