// Standing feature · updated weekly

The Breach Ledger

Every week's disclosed breaches, logged and scored — human crews and AI agents on the same page. Each entry answers three questions a board will ask: how bad was it, will it happen again, and do we have the same hole. The recurring answer is identity.

// Frequency

The weekly drumbeat

Breaches logged by week of public disclosure, split by who (or what) was at the keyboard. Agent incidents were a curiosity in June. By August they were a category.

// Where identity broke

Different attackers, same doors

Each breach is tagged with the identity weakness that opened (or widened) the path, and the control that would have broken the chain. Click a row to filter the ledger. The Mirror Test plots every breach by how often that gap exists in the wild against how likely the attack is to repeat.

Identity vectors, ranked

Breaches citing each weakness · primary or contributing

The Mirror Test

Mirror % (how common the gap is) vs. Déjà Vu (how likely it repeats) · dot size = severity
// The ledger

Every breach, newest first

Click any entry for the attack chain, the identity angle, the control that breaks it, and how each score was built. Amber tags mark attacker claims the victim hasn't confirmed.

// How the scores work

Three numbers, shown with their work

Scores are The Perimeter's editorial read, built from disclosed facts and published benchmarks — not audited measurements. Every component is visible on each entry, and scores move only when the evidence does.

Severity

0.35·blast + 0.25·data + 0.25·privilege + 0.15·ops → 0–10

Blast is how many people or organizations. Data is how sensitive (identity documents and health records sit at the top). Privilege is how deep the attacker got — a marketing inbox is a 3, domain admin is a 10. Ops is operational damage beyond the data.

Déjà Vu

0.40·frequency + 0.35·ease + 0.25·automation → 0–100

How likely this breach pattern repeats somewhere in the next quarter. Frequency is computed live from how often the identity vector appears in the ledger (so it rises as the pattern recurs). Ease is attacker cost. Automation is how much of the chain an agent or commodity tool can run unattended.

Mirror %

published benchmark for the vector → estimated % of enterprises

The share of enterprises that likely carry the same weakness today. Each vector is anchored to a published survey or dataset (below), with a confidence grade. Treat it as a planning estimate for your own gap assessment, not a census.

Identity vectorMirror %AnchorConfidenceBreaks the chain

The ledger lands in your inbox every week

// New entries, rescored patterns, and the one line to say in your next board meeting