---
license: apache-2.0
pretty_name: MABench
language:
  - en
tags:
  - clinical-ai
  - llm-security
  - ai-agents
  - healthcare
  - haarf
  - quokkaguard
  - synthetic
size_categories:
  - n<1K
task_categories:
  - other
---

# MABench

**Signed agent registry, attenuable biscuit capability tokens, and k-of-n quorum for clinical agent fleets.**

MABench is the benchmark corpus for *Who Is Calling? Cryptographic Agent Identity for Malicious Agents in Multi-Agent Clinical Systems*, the `quorum` module of the QUOKKAGUARD program. It ships with the [`quorum`](https://github.com/quome-cloud/quorum) repository, which contains the `qfire` gateway layer under test, the experiment harness, and the paper.

90 attack scenarios (18 each across T1 impersonation, T2 A2A injection, T3 confused-deputy escalation, T4 collusion/Sybil, T5 provenance forgery) and 58 legitimate handoffs over six fleet topologies (chain-2/3/5/8, star-3/5), deterministic seed 8, synthetic payloads cross-referencing the AgentDojo/InjecAgent/ASB taxonomy.

**All data are synthetic.** No real patient data or protected health information (PHI) is included; clinical content is generated from templates with fixed seeds.

## Files

| File | Size | Rows |
|---|---|---|
| `mabench/legit.jsonl` | 48 KB | 58 rows |
| `mabench/scenarios.jsonl` | 66 KB | 90 rows |
| `mabench/topologies/chain-2.yaml` | 164 B | |
| `mabench/topologies/chain-3.yaml` | 233 B | |
| `mabench/topologies/chain-5.yaml` | 357 B | |
| `mabench/topologies/chain-8.yaml` | 574 B | |
| `mabench/topologies/star-3.yaml` | 269 B | |
| `mabench/topologies/star-5.yaml` | 404 B | |

### Record schemas

- `mabench/legit.jsonl`: `id`, `attack`, `topology`, `issuer_seed`, `agents`, `fleet_budget`, `handoffs`, `expected`
- `mabench/scenarios.jsonl`: `id`, `attack`, `topology`, `issuer_seed`, `agents`, `fleet_budget`, `handoffs`, `expected`

## How it was generated

The corpus is produced by the generator in the paper repository.

## Intended use

Evaluating the **identity** enforcement layer of a clinical-agent security gateway (HAARF control C5): In a fleet of triage, ordering, pharmacy, and documentation agents that hand tasks to each other, the forwarding agent's identity is just a header string, so any member can claim a peer's role or capabilities: with no identity layer, 100% (90/90) of cross-agent attacks succeed.

The experiments that consume it (E-series in the paper) are reproduced from the repository:

```bash
git clone https://github.com/quome-cloud/quorum
cd quorum
cargo build --release
```

then follow the *Reproduce the experiments* section of its README.

## Citation

This benchmark was built to evaluate a control of the **Healthcare AI Agents Regulatory Framework (HAARF)**, the source framework for the QUOKKAGUARD program. Please cite both the paper and HAARF:

```bibtex
@unpublished{schwoebel2026quorum,
  author = {Schwoebel, James},
  title  = {Who Is Calling? Cryptographic Agent Identity for Malicious Agents in Multi-Agent Clinical Systems},
  note   = {Preprint. Quome, QUOKKAGUARD program (quorum module)},
  year   = {2026},
  url    = {https://github.com/quome-cloud/quorum}
}

@unpublished{schwoebel2026haarf,
  author = {Schwoebel, Jim and Frasch, Martin and Spalding, Art and Sewell, Ed and Englert, Phil and Halpert, Ben and Overbay, Collin and Semenec, Ingrida and Shor, Joel},
  title  = {{HAARF}: Healthcare {AI} agents regulatory framework --- a comprehensive security verification standard for autonomous {AI} systems in clinical environments},
  note   = {medRxiv Preprint},
  year   = {2026},
  month  = {April},
  doi    = {10.64898/2026.04.09.26350519},
  url    = {https://www.medrxiv.org/content/10.64898/2026.04.09.26350519v1}
}
```

## License

Apache License 2.0. Copyright (c) 2026 Quome, Inc.