# HPC access

The HPC access settings show whether your membership, policy acceptance and Site
account allow you to register an SSH public key.

## Register a key

1. Open your HPC access settings.
2. Resolve any eligibility, policy or account message shown there.
3. Add your SSH **public** key and give it a recognisable name.
4. Wait for the key to reach **Deployed**.
5. Connect using the username and login node shown by the platform.

Keep the private key on your own computer. The platform validates public-key
format, strength and duplicates and permits up to ten keys per member and Site.

Deployment includes a propagation period after the Site applies the key. A key
that is still pending may not yet work on the login node.

## Key states

| State | Meaning |
| --- | --- |
| Pending deployment | The Site is applying the key or its propagation period is still running. |
| Deployed | Application and the configured propagation period have completed. |
| Rejected | The key could not be applied; read the reason before resubmitting. |
| Pending revocation | Removal has been requested and is awaiting confirmation or propagation. |
| Revoked | Removal and the propagation period have completed. |

## Remove access

Revoke a key when you lose a device or no longer use it. Wait for **Revoked**
before treating removal as complete. Rejected and revoked keys can be deleted
from the list.

A policy or account change may require revocation and resubmission. Follow the
current settings page and contact [Support](support.md) if access remains pending.