You can use your Ping Identity credentials to sign in to HackerOne. To set up SSO via SAML for Ping Identity:
Log in to Ping Identity
Click on the Administrators button
Go to Add applications and select Browse Application Catalog
Search for the HackerOne application and click Add.
Enter the Application name and click Next
The attribute mapping is pre-filled by default and you can choose the SAML_SUBJECT to one of the PingOne mappings. In the below example, it is set to Given name
If you want to restrict access to the application, assign it to a specific group.
Click Next and copy the single sign-on URL and certificate details from the application instance.
Open HackerOne in a new tab and follow the SAML setup instructions here.
Copy the Single Sign-On URL and the X. 509 Certificate by selecting the Download Signing Certificate button in step 7, and paste them into the corresponding fields during setup.