# SC-40(4) — Signal Parameter Identification

- **Control ID:** SC-40(4)
- **Family:** [SC](/md/families/SC.md)
- **Baselines:** No content available.
- **Enhancement of:** [SC-40](/md/controls/SC-40.md)

## Description

Implement cryptographic mechanisms to prevent the identification of \[assignment\] by using the transmitter signal parameters.

## Discussion

The implementation of cryptographic mechanisms to prevent the identification of wireless transmitters protects against the unique identification of wireless transmitters for the purposes of intelligence exploitation by ensuring that anti-fingerprinting alterations to signal parameters are not predictable by unauthorized individuals. It also provides anonymity when required. Radio fingerprinting techniques identify the unique signal parameters of transmitters to fingerprint such transmitters for purposes of tracking and mission or user identification.

## Implementation guidance

No content available.

## CSF 2.0 subcategories

No content available.

## Related controls

- [SC-12](/md/controls/SC-12.md)
- [SC-13](/md/controls/SC-13.md)

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Derived from official NIST publications (NIST SP 800-53 Rev 5 and NIST CSF 2.0). nistcontrols.com is not affiliated with NIST.