---
type: "term"
title: "R-PHYSICAL (Physical Domain Isolation) **"
description: "Retired v2.0 whitepaper rule ID; not part of the v2.5 normative registry."
resource: "tlctc:term:r-physical-physical-domain-isolation"
tags:
  - "glossary"
---
# R-PHYSICAL (Physical Domain Isolation) **

*Retired v2.0 whitepaper rule ID; not part of the v2.5 normative registry. Its sequencing substance is carried by the #8 cluster definition and boundary tests (core paper §4); its admission question is now settled normatively by R-SUBSTRATE. The ID keeps this original meaning and is never reused.*

Original statement: If the attacker's advantage comes from unauthorized physical interaction or interference with hardware, facilities, media, or signals, that step MUST be classified as `#8 Physical Attack`, and subsequent technical steps MUST be classified separately. Note that R-SUBSTRATE corrects a latent misreading of this phrasing: attacker physical access or proximity is NOT required for `#8`.

**Reference:** whitepaper §4.2.5 (R-PHYSICAL); superseded by core paper §4 (#8 boundary tests) and R-SUBSTRATE (core §6.1)
