Source reliability and confidence.
Liberty91 rates every piece of information it learns from on two axes: how reliable the source is, and how credible the data is. It uses the NATO Admiralty scale, a long-standing intelligence convention, and applies the resulting rating as a weight when it adds information to a knowledge base. More reliable, more credible information carries more weight.
What is the Admiralty scale?
The Admiralty scale (also called the Admiralty code) rates two things independently:
| Source reliability | Information credibility | ||
|---|---|---|---|
| A | Completely reliable | 1 | Confirmed by other sources |
| B | Usually reliable | 2 | Probably true |
| C | Fairly reliable | 3 | Possibly true |
| D | Not usually reliable | 4 | Doubtful |
| E | Unreliable | 5 | Improbable |
| F | Cannot be judged | 6 | Cannot be judged |
A rating is written as a letter and a number. For example, B2 means a usually reliable source reporting information assessed as probably true.
How Liberty91 uses the rating
When an event is deemed relevant to an Intelligence Requirement, a threat entity, asset, or supplier, the platform assesses the source and the data and assigns an Admiralty rating. That rating becomes a weight in the knowledge base, so well-sourced information shapes the analysis more than weak or unconfirmed reporting. This is one of the ways the platform keeps its knowledge grounded and reduces hallucination in the products it generates.
You can read more about the original decay and weighting research on the CIRCL Decaying Indicators of Compromise work that informs Liberty91's IOC scoring. See also IOC enrichment and decay scoring.