ASD ISM — incremental change analysis

Release v2025.09.15 (2025-09-15) vs prior v2025.09.10 · 5 days · catalogue 1058 controls · NC-explicit era

ASD changes summary: not available online (pre-June-2024 or errata release)

Added

Substantive

Clarification

Editorial

Relocated

Scope changes

Removed

1 · Change typology

2 · Classification footprint

Ceiling (highest level reached) / Floor (lowest level reached) — material changes

Level	as ceiling	as floor
TOP SECRET	0	0
SECRET	0	0
PROTECTED	0	0
OFFICIAL: Sensitive	0	0
Non-Classified	0	0

3 · Level-specific material changes

No level-specific material changes — every added/substantive control applies at all classifications (NC|OS|P|S|TS).

5 · Control call-outs by category

Added — new controls (0)

None.

Substantive amendments (0)

None.

Clarifications (0)

None.

Editorial / grammatical (0)

Cosmetic edits (normalised edit distance < 0.05). None

Relocated (0)

0 cross-chapter moves (listed) · 0 intra-chapter section/topic reshuffles (count only).

Scope / applicability changes (0)

No control changed its classification reach this release.

Removed (0)

None.

Method. Controls only (ISM-principles excluded). A content modification requires ASD's native revision/updated stamp to move (0 prose-only re-renders excluded as format noise). Relocation compares case/spelling-normalised chapter›section›topic paths. Nature = normalised edit distance (editorial <0.05, clarification <0.25, substantive ≥0.25 — uncalibrated). Footprints normalised across schemes (O→OS, ALL→NC|OS|P|S|TS); pre-Dec-2024 NC imputed.

Generated by ISMexplorer v1.0.0 — longitudinal and per-release analysis of ASD Information Security Manual control changes.

Information Security Manual (ISM) published by Australian Signals Directorate / Australian Cyber Security Centre and © Commonwealth of Australia 2022-2026;
ISMexplorer analysis tool and publication © Baden Hughes, 2022-2026