Data transmission encrypted
Plain English Translation
Organizations must implement encryption for ePHI transmitted over open networks whenever appropriate, based on the risk assessment and the sensitivity of the data in transit. Unencrypted ePHI sent over the internet constitutes a significant compliance risk and potential breach.
Technical Implementation
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Required Actions (startup)
- Configure all web servers and load balancers to enforce HTTPS using TLS 1.2 or higher.
- Ensure all emails containing ePHI are sent using verified encrypted email services.
Required Actions (scaleup)
- Implement inter-node transparent encryption for clustered databases and backend services.
- Audit and disable all deprecated TLS protocols and weak ciphers across cloud environments.
Required Actions (enterprise)
- Enforce end-to-end (E2E) encryption across the entire microservices architecture using service meshes and mutual TLS (mTLS).
- Utilize automated CSPM tools to continuously monitor and immediately block insecure protocols or open FTP connections.
HIPAA requires organizations to implement mechanisms to encrypt ePHI whenever deemed appropriate during transmission over an electronic communications network.
Yes, while encryption in transit is listed as an addressable specification, organizations must implement it or a rigorously documented, equally effective alternative.
HIPAA transmission security refers to technical safeguards designed to guard against unauthorized access to ePHI that is being actively transmitted over a network.
It is the specific HIPAA addressable implementation specification requiring a technical mechanism to encrypt ePHI whenever it is transmitted over electronic networks.
Yes, if an email containing ePHI is transmitted over open networks like the internet, the organization must encrypt the transmission to prevent unauthorized interception.
While HIPAA is technology-neutral, organizations should follow current industry best practices, such as using TLS 1.2 or higher and strong cipher suites, while avoiding deprecated protocols.
ePHI is protected over the internet by enforcing strong encryption protocols like HTTPS/TLS for web traffic, utilizing VPNs for remote access, and deploying secure email gateways.
Addressable means the organization must assess if encryption is a reasonable and appropriate safeguard; if it is, they must implement it, or strictly document an equivalent alternative measure.
Organizations should document their risk assessments, architectural diagrams, TLS configurations, and formally publish an encryption policy detailing their cryptographic decisions.
Encryption at rest protects data stored statically on physical or virtual media, while encryption in transit protects data actively moving across networks from interception.
Encryption controls often produce evidence across load balancer settings, TLS certificates, API configurations, email security controls, and cloud scan results. Tools like WatchDog Security's Compliance Center can help centralize that evidence, map it to HIPAA transmission security requirements, and identify gaps before an audit.
Insecure protocols such as HTTP, FTP, weak TLS versions, or exposed backend services can reappear as systems change. Tools like WatchDog Security's Posture Management can help detect misconfigurations, flag deprecated protocols, and provide remediation guidance for engineering teams.
| Version | Date | Author | Description |
|---|---|---|---|
| 1.0.0 | 2026-05-05 | WatchDog GRC Team | Initial publication |
