SC-16(3)—Transmission of Security and Privacy Attributes | Cryptographic Binding

IL5

IL6

>Control Description

Implement ⚙organization-defined mechanisms or techniques to bind security and privacy attributes to transmitted information.

>DoD Impact Level Requirements

No specific parameter values or requirements for this impact level.

>Discussion

Cryptographic mechanisms and techniques can provide strong security and privacy attribute binding to transmitted information to help ensure the integrity of such information.

>Kubernetes Implementation Examples

# Bind service identity cryptographically via SPIFFE (mTLS)
apiVersion: security.istio.io/v1
kind: AuthorizationPolicy
metadata:
  name: require-spiffe-identity
  namespace: protected-workloads
spec:
  rules:
  - from:
    - source:
        principals:
        - "cluster.local/ns/protected-workloads/sa/*"

Source: SC-16(3): SPIFFE-based Cryptographic Binding

>Relevant Technologies

Technology-specific guidance with authoritative sources and verification commands.

Kubernetes

>Related Controls

AC-16

SC-12

SC-13

>Assessment Interview Topics

Questions assessors commonly ask

Process & Governance:

•What policies govern the implementation of cryptographic binding?
•How are system and communications protection requirements defined and maintained?
•Who is responsible for configuring and maintaining the security controls specified in SC-16(3)?
•What is your cryptographic key management policy?

Technical Implementation:

•How is cryptographic binding technically implemented in your environment?
•What systems, tools, or configurations enforce this protection requirement?
•How do you ensure that cryptographic binding remains effective as the system evolves?
•What encryption mechanisms and algorithms are used to protect data?

Evidence & Documentation:

•What documentation demonstrates the implementation of SC-16(3)?
•Can you provide configuration evidence or system diagrams showing this protection control?
•What logs or monitoring data verify that this control is functioning correctly?
•Can you demonstrate that FIPS 140-2 validated cryptography is used?

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