Connections and keys
When you have permission to reference two datasets, we say they are connected. Two datasets are connected in any of the following scenarios:
- If you own both datasets. These datasets are automatically connected because you always have permission to reference your own data.
- If you own one of the datasets, and have a permission to reference the other. You'll see that permission on the Incoming Permissions tab.
- If both datasets belong to other parties, and you have a permission to reference each of them. Again, you'll see both those permissions on the Incoming Permissions tab.
On the Connections tab in Dataset Manager, you'll see all the datasets you are able to reference, and all the connections between them. You can use this information to visualise at a glance the possible combinations of datasets for your query.
To use datasets together in a query, they must also have at least one key in common.
Keys are the anonymised information InfoSum uses to identify records in separate datasets which relate to the same individual. A key might be a single piece of data, or a combination of data items which together uniquely identify a person.
Once you've configured your categorisations and transformations, your Bunker generates keys for each row. Keys are anonymised version of the row's PII, used solely to match up records in your and your partner's Bunkers.
Two Bunkers with the same PII will generate the same key, so the two Bunkers can use their keys to identify records which relate to the same person. But it isn't possible to use a key to recover the original information. So, even in the unlikely event that a key was compromised, this wouldn't reveal the PII.
You can check whether datasets share a common key on the Connections tab of Dataset Manager.