HIE connection to regional exchange
SC-1 procedures require mutual TLS, certificate management, and logging before production ADT feeds with ePHI.
System and Communications Protection Policy and Procedures
High Risk
Moderate
Medium Cost
SC-1 requires system and communications protection policy and procedures addressing purpose, scope, roles, management commitment, coordination, and compliance, plus procedures to implement the SC family. Healthcare SC-1 sets enterprise rules for network boundaries, encryption in transit/at rest, segmentation of clinical networks, email/HIE transmission security, and protection of communications paths carrying ePHI.
Control Objective
Establish policy and procedures that protect ePHI and supporting systems through secure architectures, communications protections, and cryptographic controls commensurate with risk.
Implementation Guidance
- Publish SC-1 policy covering networks, APIs, email, VPN, wireless, and application transmission of ePHI.
- Require encryption in transit for ePHI crossing untrusted networks; address at-rest encryption expectations (link SC-28).
- Define boundary protection and clinical network segmentation principles.
- Prohibit clear-text protocols for ePHI where alternatives exist.
- Assign architecture ownership (network/security engineering) and exception handling.
- Include medical device network constraints and compensating controls.
- Review annually and after major network or cloud connectivity changes.
- Align with SC-7, SC-8, SC-13, and HIPAA transmission security.
Real-World Use Cases
How this control shows up in healthcare and HIPAA-covered environments.
Physician emailing records
Policy mandates secure messaging or encrypted email solutions — blocking unencrypted PHI in standard email.
IoT pumps on clinical VLAN
Segmentation standards under SC-1 limit lateral movement toward EHR servers.
Best Practices
- Encryption standards catalog (TLS versions, cipher suites).
- Segment clinical, guest, and admin networks.
- Documented exceptions with expiry.
- Certificate lifecycle management.
- Cloud egress controls for ePHI apps.
- Architecture review for new interfaces.
Common Gaps & Violations
- FTP or clear-text HL7 over WAN.
- Flat network with devices and EHR servers mixed.
- Email PHI without encryption solution.
- Expired certificates on patient-facing portals.
- No policy for API security to mobile health apps.
Required Documentation
- System and communications protection policy (SC-1)
- Encryption and transmission procedures
- Boundary/segmentation standards
- Exception process
- Policy review records
How to Test & Validate
- Verify SC-1 policy addresses transit and boundary protections.
- Sample an external ePHI interface for encryption.
- Review network diagrams vs segmentation standards.
- Check secure email/HIE usage against policy.
- Inspect open exceptions for currency.
Audit Considerations
Transmission security and encryption decisions are core HIPAA technical safeguard topics. SC-1 provides the authoritative standards assessors test against.
HIPAA Mapping
How this NIST control supports HIPAA Security Rule expectations.
- 164.312(e) Transmission Security — integrity controls and encryption for ePHI transmitted over electronic communications networks.
- 164.312(a)(2)(iv) Encryption and Decryption — address encrypting ePHI at rest where reasonable and appropriate.
- 164.306 Security standards general rules — scalable protections based on risk.
- 164.316 Policies and procedures — document SC policy and procedures.
Compliance Tips
- Maintain an interface inventory with encryption status for every ePHI flow.
- Put SC-1 checks in the interface go-live checklist.
- Prefer platform secure chat over SMS for care-team PHI.
Frequently Asked Questions
Does SC-1 require encrypting all ePHI at rest?
Policy should require risk-based encryption; for portable media and many servers it is expected — document decisions where not applied.
How does SC-1 relate to SC-8?
SC-1 is the policy; SC-8 implements transmission confidentiality and integrity under that policy.
Are fax transmissions in scope?
Address fax and telephony in procedures if used for PHI; modern policy often prefers secure digital alternatives.
References & Resources
- NIST SP 800-53 Rev. 5 — SC-1
- HIPAA § 164.312(e)
- Related controls: SC-7, SC-8, SC-13, SC-28, AC-4
Related Guidelines
Related controls that commonly accompany SC-1.
Need Help Implementing SC-1?
Our auditors map NIST SP 800-53 controls to your HIPAA Security Rule program — policies, technical evidence, and audit readiness.