NUWA Risk Evaluation · Method
A Decision-Theoretic Formalisation of Steganography With Applications to LLM Monitoring
NUWA research note · independent review pending
NUWA Research Note
Research questionDesign and assumptionsSource findingsNUWA interpretationLimits and contrary evidenceResearch and decision relevanceInstitutions and rolesOriginal resourcesModel-assisted reading · Selected sections of the original full text or official article; a complete section-by-section audit remains pending.
At a glance
NUWA interpretation: the gap is relative to the chosen agents, task and utility, not an absolute property of a text string.
Research question
Can hidden information be measured without knowing a clean reference-language distribution?
Design and assumptions
The formalism compares downstream usable-information utility for a receiver and a sentinel on an auditor-defined task, defining a steganographic gap.
Source findings
The source proposes an observable decision-based alternative to classical reference-distribution tests.
Empirical results show sentinel family and willingness to process inputs can change the measured gap.
NUWA interpretation
NUWA interpretation: the gap is relative to the chosen agents, task and utility, not an absolute property of a text string.
Limits and contrary evidence
A weak or refusing sentinel can inflate the gap; theoretical applicability and empirical detection are distinct claims.
Research and decision relevance
Model recommendation: audit sentinel capability and task controls before interpreting a large gap as hidden malicious reasoning.
Precise source locations
- A Decision-Theoretic Formalisation of Steganography With Applications to LLM Monitoring · AbstractSelected original resource https://arxiv.org/html/2602.23163; sha256:00674902495f2bd855834b61e9c9e5bdb499102b364524406aec6da7f0f0c8a2; archived source capture; exact capture time not independently established
- A Decision-Theoretic Formalisation of Steganography With Applications to LLM Monitoring · §4.2 Setup and NotationSelected original resource https://arxiv.org/html/2602.23163; sha256:00674902495f2bd855834b61e9c9e5bdb499102b364524406aec6da7f0f0c8a2; archived source capture; exact capture time not independently established
- A Decision-Theoretic Formalisation of Steganography With Applications to LLM Monitoring · §4.4 DiscussionSelected original resource https://arxiv.org/html/2602.23163; sha256:00674902495f2bd855834b61e9c9e5bdb499102b364524406aec6da7f0f0c8a2; archived source capture; exact capture time not independently established
- A Decision-Theoretic Formalisation of Steganography With Applications to LLM Monitoring · Appendix G.6: sentinel-family resultSelected original resource https://arxiv.org/html/2602.23163; sha256:00674902495f2bd855834b61e9c9e5bdb499102b364524406aec6da7f0f0c8a2; archived source capture; exact capture time not independently established
Source checking, extraction, editorial approval and replication are recorded separately. Methodology →
Institutions and roles
Cite and reuse
Cite the original publication for its findings. Cite this NUWA record separately for its explanation and retained snapshot.
Original publication · BibTeX
@misc{steganography-monitoring,
title = {A Decision-Theoretic Formalisation of Steganography With Applications to LLM Monitoring},
url = {https://www.aisi.gov.uk/research/a-decision-theoretic-formalisation-of-steganography-with-applications-to-llm-monitoring},
year = {2026},
date = {2026-04-29},
version = {Source capture 2026-10-25},
note = {Source capture 2026-10-25}
}
NUWA record · BibTeX
@misc{steganography-monitoring-nuwa,
title = {A Decision-Theoretic Formalisation of Steganography With Applications to LLM Monitoring — NUWA research record},
url = {https://whitzard.tech/en/nuwa/whitzard-index/work/steganography-monitoring/},
version = {2026-10-29.1},
organization = {NUWA Frontier AI Safety Lab},
howpublished = {Retained note edition: https://whitzard.tech/nuwa/whitzard-index/data/record-editions/2026-10-29.1--steganography-monitoring.json},
note = {NUWA research note. Source-reading scope and independent review status are stated on the record. Snapshot 2026-10-29.1. Retained note edition: https://whitzard.tech/nuwa/whitzard-index/data/record-editions/2026-10-29.1--steganography-monitoring.json.}
}
Evidence snapshot 2026-10-29.1 · Index updates · RSS
References
- [1] A Decision-Theoretic Formalisation of Steganography With Applications to LLM Monitoring. 2026-04-29 ; Official publication masthead and article byline; Abstract; §4.2 Setup and Notation
- [2] Read the full paper