HIPAA TS-5.1: Transmission Security — Integrity Controls
Electronically transmitted Protected Health Information (ePHI) must remain intact and unaltered during transmission. HIPAA Security Rule TS-5.1 requires organizations to deploy security measures that detect any unauthorized modification of ePHI before it reaches its destination or disposal. This control is critical for healthcare organizations handling sensitive patient data across networks.
What this means
TS-5.1 mandates technical and administrative safeguards to ensure ePHI integrity during electronic transmission. This means implementing mechanisms that detect—and ideally prevent—any unauthorized changes to patient data as it moves between systems, networks, or storage locations. Your organization must have processes in place to identify tampering before ePHI is used or permanently deleted, maintaining audit trails and validation protocols throughout the transmission lifecycle.
How to comply
- 1.Deploy cryptographic checksums or message authentication codes (MACs) on all ePHI transmissions to detect unauthorized modifications
- 2.Implement digital signatures for critical healthcare data exchanges to ensure data origin authentication and integrity verification
- 3.Use encrypted transmission protocols (TLS/SSL) for all network communications containing ePHI to prevent interception and modification in transit
- 4.Establish baseline integrity values for ePHI datasets and monitor for deviations during transmission and storage
- 5.Document all transmission security measures and maintain audit logs showing data integrity validation checkpoints
- 6.Conduct regular integrity verification testing and incident response drills to ensure detection mechanisms function correctly
- 7.Train staff on identifying and reporting potential data integrity breaches or suspicious transmission anomalies
Evidence auditors look for
- Configuration documentation for cryptographic hashing or MAC implementations on network interfaces
- Digital signature certificates and validation logs for ePHI transmissions
- TLS/SSL configuration audits and certificate inventory with expiration tracking
- Integrity baseline documentation and change detection audit logs
- Network traffic captures demonstrating encrypted ePHI transmission
- Integrity verification test results and validation reports
- Incident response procedures specific to transmission integrity breaches
- Staff training records covering transmission security protocols and detection procedures
Frequently asked questions
When will FAQs be available?
The FAQ for this control is currently being prepared.
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