Are faxes encrypted by default?

Traditional analog faxes sent over PSTN phone lines are NOT encrypted — they transmit as audible tones vulnerable to interception. Modern online fax services encrypt transmissions using TLS 1.2+ and store documents with AES-256 encryption. See our full breakdown in [Are Faxes Encrypted?](/blog/are-faxes-encrypted/)

What encryption standard does online fax use?

Reputable online fax services use TLS 1.2 or TLS 1.3 for data in transit and AES-256 for data at rest. Some support T.38 over SIP/TLS for real-time VoIP fax transmission, adding an extra layer of protection end-to-end.

Is encrypted fax HIPAA compliant?

Encrypted fax can meet HIPAA requirements when the service uses TLS 1.2+, AES-256 storage encryption, provides audit logs, and signs a Business Associate Agreement (BAA). The BAA is the critical legal requirement — without it, no fax service is HIPAA compliant regardless of encryption. See our [HIPAA compliant fax guide](/blog/hipaa-compliant-fax/).

How do I send an encrypted fax?

Use an online fax service that encrypts transmissions automatically. Sign up, upload your document (PDF, Word, image), enter the recipient fax number, and send. The service handles TLS encryption and AES-256 storage without any extra steps on your end.

Is encrypted fax safer than encrypted email?

Both offer strong protection when properly implemented. Encrypted fax creates a dedicated point-to-point delivery with a confirmed receipt, while even encrypted email routes through multiple servers. For healthcare, legal, and compliance contexts, encrypted fax is generally preferred.

Encrypted Fax: How It Works, Pricing & Secure Alternatives

Encrypted fax uses TLS and AES-256 to protect your documents in transit and at rest — traditional fax machines offer none of this. Learn how fax encryption works, which services provide it, and how to send a secure fax today.

Frequently Asked Questions

Are faxes encrypted by default?: Traditional analog faxes sent over PSTN phone lines are NOT encrypted — they transmit as audible tones vulnerable to interception. Modern online fax services encrypt transmissions using TLS 1.2+ and store documents with AES-256 encryption. See our full breakdown in [Are Faxes Encrypted?](/blog/are-faxes-encrypted/)
What encryption standard does online fax use?: Reputable online fax services use TLS 1.2 or TLS 1.3 for data in transit and AES-256 for data at rest. Some support T.38 over SIP/TLS for real-time VoIP fax transmission, adding an extra layer of protection end-to-end.
Is encrypted fax HIPAA compliant?: Encrypted fax can meet HIPAA requirements when the service uses TLS 1.2+, AES-256 storage encryption, provides audit logs, and signs a Business Associate Agreement (BAA). The BAA is the critical legal requirement — without it, no fax service is HIPAA compliant regardless of encryption. See our [HIPAA compliant fax guide](/blog/hipaa-compliant-fax/).
How do I send an encrypted fax?: Use an online fax service that encrypts transmissions automatically. Sign up, upload your document (PDF, Word, image), enter the recipient fax number, and send. The service handles TLS encryption and AES-256 storage without any extra steps on your end.
Is encrypted fax safer than encrypted email?: Both offer strong protection when properly implemented. Encrypted fax creates a dedicated point-to-point delivery with a confirmed receipt, while even encrypted email routes through multiple servers. For healthcare, legal, and compliance contexts, encrypted fax is generally preferred.