Colour Code for SECRET Cables
SECRET cables are identified by their salmon pink colour.
Plain language
This control is about making sure that cables used for SECRET information are a salmon pink colour. It's critical because having these cables misidentified can lead to sensitive information being accessed by the wrong people, which could jeopardise security and confidentiality.
Framework
ASD Information Security Manual (ISM)
Control effect
Preventative
Classifications
S
ISM last updated
Feb 2023
Control Stack last updated
19 Mar 2026
E8 maturity levels
N/A
Section
Cabling infrastructureTopic
Cable ColoursOfficial control statement
SECRET cables are coloured salmon pink.
Why it matters
If SECRET cables are not salmon pink, they risk misidentification, potentially exposing sensitive data to unauthorised individuals.
Operational notes
Regularly verify SECRET cable colours remain salmon pink, and replace any that have faded so identification remains consistent.
Implementation tips
- IT manager should ensure that all cables intended for SECRET data are coloured salmon pink. This can be done by specifying salmon pink when ordering new cables and checking existing cables to confirm they meet this requirement.
- Procurement officers should include colour specifications in purchase orders for cables. They should clearly state that any cables for SECRET data must be salmon pink to comply with this security measure.
- Facility management should audit the current cable installations in secure areas. This involves physically checking that cables are correctly coloured and replacing any that are not the right shade.
- Security officers should regularly inspect cable colour compliance during routine building security checks. They can add this step to their checklist to ensure all areas continue to comply with the required standards.
- Training coordinators should educate all staff involved with handling or installing cables on the importance of using the correct colour. Run a short session highlighting the significance of using salmon pink for SECRET cables to maintain security.
Audit / evidence tips
-
Askthe latest cable colour specification document: Verify if the document lists salmon pink for SECRET cables
Goodshows salmon pink as designated for SECRET use, with no conflicting information
-
Askto see purchase orders or invoices for cables: Check these documents to confirm salmon pink cables were ordered for SECRET use. Good evidence is a clear match between orders and the colour-specific requirements
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Askthe facility’s cable audit report: Review to see if the audit covered all areas with SECRET cables and noted any compliance issues
Goodreport lists all SECRET cable areas and confirms they meet the salmon pink requirement
-
Askthe security officers to demonstrate their inspection checklist
Goodchecklist specifically names checks for salmon pink in SECRET areas
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Asktraining session records
Cross-framework mappings
How ISM-1718 relates to controls across ISO/IEC 27001, Essential Eight, and ASD ISM.
ISO 27001
| Control | Notes | Details |
|---|---|---|
| layers Partially meets (1) expand_less | ||
| Annex A 7.12 | ISM-1718 mandates that SECRET cables are identified by a distinctive salmon pink colour | |
These mappings show relationships between controls across frameworks. They do not imply full equivalence or certification.