The additive entropy decomposition is an upper bound, not a security measure; adversary uncertainty is a conditional entropy¶
Claim · All claims
Evidence · 1 study · theoreticalr2·q1
Currency · newest study 2026 · not yet checked against its sources · not reviewed by a person · recheck by 2029: tool and model accuracy changes quickly
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q1 i? By sub-additivity of joint Shannon entropy, the four-component sum upper-bounds the joint entropy with equality only under mutual independence, which the generator contradicts by construction; what an adversary faces is the residual conditional entropy given the captured stream. → Gupta 2026
Evidence¶
Gupta 2026¶
Gupta, L. R., Kaur, K., Ram, D. S., & Parani, P. (2026). Behaviorally Adaptive Visual Diversion for Inclusive and Resilient Digital Assessment Delivery. arXiv preprint, under review at IEEE Transactions on Learning Technologies. https://arxiv.org/abs/2608.03531 doi:10.48550/arxiv.2608.03531
q1 · i? · theoretical · r2
Analytical correction (Equations 11a-11b, Theorem 3): decoy placement is drawn conditionally on item layout, making diversion and spatial terms dependent, so conflating the decomposition with security would let a system look secure because it is merely busy; the composite retains a human-factors auditing role.
"Marginal entropy is not the quantity a security claim rests on. What an adversary faces is the residual uncertainty about the field after observing the captured stream without holding the key"
Discussion¶
Related Claims¶
- Theoretical results establish content fidelity, rendering stability, entropy boundedness, and integrity convergence for the BAVD model — related
- Accessibility attenuation buys reduced sensory burden at a measurable, monotone cost in capture resistance — related
- The temporal diversion channel is unavailable on commodity 60 Hz displays, leaving a weaker spatial-only variant
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
bavd-entropy-decomposition-upper-bound-not-security-measure |
title |
The additive entropy decomposition is an upper bound, not a security measure; adversary uncertainty is a conditional entropy |
description |
The additive entropy decomposition is an upper bound, not a security measure; adversary uncertainty is a conditional entropy |
status |
review |
evidence_strength |
weak |
newest_evidence |
2026 |
recheck_by |
2029 |
generated |
by process:wiki-ingest on 2026-10-10 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — gupta-2026 |
Frontmatter is the page's machine-readable record — see the Schema & Guide.