Uploading an SSH Key to CILogon Registry

CU Boulder Research Computing uses CILogon to manage key-based login (CU Anschutz users, only) and passwordless data transfers with scp and rsync (CU Boulder and AMC, only). Access to the RMACC CILogon Registry is available by invitation only.

Step 1: Enroll in the RMACC CILogon Registry

Request an invitation to the RMACC CILogon Registry by emailing rc-help@colorado.edu and explaining your intended use case (e.g., automated data transfers). After your case has been assigned, you will receive an email from registry@cilogon.org inviting you to enroll in the RMACC Registry.


Follow the invitation URL and click ‘Accept’. The invitation link becomes invalid once you click ‘Accept’, so complete all of Step 1 before closing your browser tab.


You will be automatically routed to the login page. If you access CURC resources with a CU Boulder account, select ‘University of Colorado at Boulder’ from the Identity Provider dropdown menu and click ‘Log On’. If you access CURC resources with an ACCESS account, select ‘ACCESS CI (XSEDE)’ from the dropdown menu.

Enter your CU Boulder or ACCESS username and password and click ‘Login’. Accept the Duo push from your device.

IMPORTANT: You can move on to Step 2, but please make sure 10 minutes have elapsed between completing Step 1 and beginning Step 3.

Step 2: Generate an ssh key

You are strongly encouraged to set a passphrase for your key pair. You will be prompted to enter the passphrase each time you log in.

SSH Key Generation for Windows Users:

  • Using command prompt, PowerShell, or Windows Terminal: https://www.howtogeek.com/762863/how-to-generate-ssh-keys-in-windows-10-and-windows-11/
  • Using PuTTY: https://devops.ionos.com/tutorials/use-ssh-keys-with-putty-on-windows/

SSH Key Generation for Mac Users: https://docs.tritondatacenter.com/public-cloud/getting-started/ssh-keys/generating-an-ssh-key-manually/manually-generating-your-ssh-key-in-mac-os-x

Step 3: Upload your ssh key to registry.cilogon.org

After logging into registry.cilogon.org with your ACCESS credentials, click on the dropdown menu in the upper right hand corner by your name. Select ‘MY PROFILE (RMACC)’.

Select ‘Authenticators’ from the menu on the right.


Click ‘Manage’ in the SSHKeyAuthenticator row. ../_images/manage_sshkeyauthenticator1.png

Select ‘Add SSH Key’. ../_images/add_sshkey1.png

Click ‘Choose File’. If you store your SSH keys in a hidden directory (e.g. ~/.ssh), it may be difficult to locate your public key using a Finder/File Explorer window. As a workaround, you can copy your public key to an easily discoverable location using the Terminal App/Windows Command Prompt:
cp ~/.ssh/id_rsa.pub ~/Desktop

Locate your public key (<keyname>.pub) on your local drive, then click ‘UPLOAD’. ../_images/upload_sshkey1.png

A green message box will notify you that your SSH key was successfully added to your account.

Deleting or Replacing SSH Keys in RMACC CILogon Registry

Log in at registry.cilogon.org and navigate to the ‘Authenticators’ section of your profile (see Step 3, above). Click ‘Delete’, then repeat the process for adding a new key. It will take a few minutes before you can log in with your new key.


  • If you receive an error message indicating that you are not in the COmanage registry (see screenshot below), please email rc-help@colorado.edu. Please include a screenshot of the error message and the date/time of your last login attempt.