Encryption in Transit and at Rest
Also known as: TLS and AES-256 · data encryption
Definition
Encryption in transit protects data as it moves across networks (commonly via TLS 1.2/1.3), and encryption at rest protects data where it is stored (commonly via AES-256). Together they ensure that intercepted traffic and compromised storage are both unreadable to unauthorized parties. Both layers are expected safeguards for any system handling PHI.
What it is
Encryption in transit protects data as it moves across networks (commonly via TLS 1.2/1.3), and encryption at rest protects data where it is stored (commonly via AES-256). Together they ensure that intercepted traffic and compromised storage are both unreadable to unauthorized parties.
Why it matters for practices
PHI can be exposed in two ways: while it's moving (intercepted traffic) and while it's stored (compromised storage). Protecting only one layer leaves the other vulnerable. Both layers are expected safeguards for any system handling PHI — not optional, baseline.
How Quadline Systems approaches it
Quadline Systems protects patient data with TLS 1.2/1.3 in transit and AES-256 at rest, so both intercepted traffic and compromised storage remain unreadable. Every capture, follow-up, reminder, and review request flows through encrypted channels.
Key Takeaways
- Encryption in transit (TLS) protects data moving across networks.
- Encryption at rest (AES-256) protects data where it's stored.
- Both layers are expected safeguards for any system handling PHI.
Educational, Not Legal Advice
This glossary entry is provided for general orientation only. It is not legal, compliance, or regulatory advice and does not create any obligation or guarantee on the part of Quadline Systems. Compliance requirements vary by jurisdiction and use case; practices should consult qualified legal counsel for guidance specific to their circumstances. Any operational outcomes referenced are design targets and typical results, which vary by practice, patient base, and implementation.
Encryption in Transit and at Rest — common questions
In transit means data moving across networks (protected by TLS). At rest means data stored somewhere (protected by AES-256). Both must be encrypted to fully protect PHI.
Related terms
View allBusiness Associate Agreement (BAA)
A required legal contract between a practice and any vendor that handles patient data on its behalf.
Read definitionComplianceHIPAA Privacy Rule
The federal standard that governs how protected health information may be used and disclosed.
Read definitionComplianceProtected Health Information (PHI)
Any individually identifiable health information held or transmitted by a covered entity.
Read definitionSee Encryption in Transit and at Rest in the Quadline Systems platform
See Encryption in Transit and at Rest in action
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