Every Call.Encrypted.By Default.
SRTP media encryption and TLS 1.3 signaling protection are built into every Big Sky Telecom account - no extra cost, no configuration required. Your calls are private from the moment they leave your device.
Three Layers of Protection - Signaling, Media & Storage
Full encryption at every stage of the call lifecycle - from the SIP handshake to long-term recording storage.
Transport Layer Security encrypts all SIP signaling between your devices and our platform - call setup, teardown, DTMF tones, and metadata. Prevents interception of who called whom and when.
Secure Real-time Transport Protocol encrypts the actual audio stream - the voice data packets themselves. Even if a packet is intercepted on the network, it's indecipherable without the session key.
Call recordings and cloud fax documents are encrypted at rest using AES-256. Keys are managed separately from data - access requires both the encrypted file and the key, which are stored independently.
From Dial to Disconnect - Nothing Is Exposed
Encryption is automatic and invisible to users. From the first SIP packet to the last RTP frame, every element of your call is protected without any extra steps from your team.
Device Authenticates
Your desk phone, softphone, or mobile app initiates a TLS handshake with our SIP platform. Certificates are verified - unauthorized devices are rejected before a call can be placed.
Signaling Encrypted
All call setup messages - who you're calling, when, and from where - travel inside the TLS tunnel. The SIP INVITE and all control messages are invisible to network observers.
Session Keys Negotiated
Using DTLS-SRTP, both endpoints negotiate unique encryption keys for the voice session. Keys are ephemeral - a new key pair is generated for every single call.
Media Stream Encrypted
Voice packets are encrypted with SRTP before transmission. Each RTP packet is individually encrypted and authenticated - eavesdroppers capture only indecipherable ciphertext.
Call Terminates Securely
Session keys are discarded when the call ends. Perfect forward secrecy means past calls remain protected even in the event of a future key compromise.
Each call gets a unique key. Past calls stay protected - forever.
Encryption Across Regulated Industries
SRTP and TLS encryption are recognized technical safeguards under HIPAA, GLBA, FINRA, and CJIS - supporting your compliance program without adding IT complexity.
Healthcare (HIPAA)
HIPAA's Security Rule requires protecting electronic Protected Health Information (ePHI) in transit and at rest. Unencrypted voice calls that transmit patient information - appointment details, diagnoses, prescriptions - may constitute a HIPAA violation.
Encryption is a technical safeguard under HIPAA. A complete HIPAA program also requires BAAs, access controls, and workforce training.
Financial Services (FINRA / SEC / GLBA)
Financial institutions handling non-public customer information face stringent data protection obligations under GLBA, SEC Rule 17a-4, and FINRA regulations. Call recording and data-in-transit protection are frequently audited.
Confirm specific regulatory requirements with your compliance officer. Big Sky Telecom encryption is a supporting control, not a complete compliance program.
Legal (Attorney-Client Privilege)
Attorney-client privilege requires reasonable steps to maintain confidentiality. Unencrypted calls over public networks are potentially interceptable - a growing risk for law firms handling sensitive litigation, M&A, and regulatory matters.
Encryption on the Big Sky Telecom network covers transmission on our infrastructure. End-to-end encryption to PSTN endpoints depends on the terminating carrier.
Government & Municipal
State and local government agencies handling sensitive citizen data, law enforcement communications, or regulated records benefit from encrypted voice infrastructure aligned with NIST SP 800-53 and CJIS Security Policy guidance.
FedRAMP authorization is not claimed. Consult your agency's ISSO for specific compliance mapping.
Which Plans Include Encryption?
Core SRTP/TLS encryption is included on every plan at no extra cost. Advanced features like recording and fax encryption are available on higher tiers.
| Encryption Feature | General Ext. | Bundled Seat | Call Center Seat | SIP Trunk |
|---|---|---|---|---|
| TLS 1.3 Signaling Encryption | ||||
| SRTP Voice Media Encryption | ||||
| AES-256 Recording Encryption | ||||
| AES-256 Fax Storage Encryption | ||||
| TLS Voicemail-to-Email Delivery | ||||
| DTLS-SRTP Key Negotiation | ||||
| CDR Audit Trail | ||||
| Encrypted SMS in Transit |
All SRTP / TLS encryption is active by default - no configuration required. Call Center Seat column highlighted for features exclusive to that tier.
See Full Plan ComparisonWhat Our Customers Say
From healthcare to finance - encrypted by default, trusted in practice.
"Our compliance officer required encrypted voice before we could migrate from our old ISDN lines. Big Sky had SRTP and TLS enabled by default - no configuration required on our end."
"We handle sensitive client calls daily. Knowing every call on our phone system is encrypted in transit - without paying extra or jumping through IT hoops - is exactly what we needed."
Technical FAQ
Answers for IT teams, compliance officers, and security-minded business owners.
Is encryption enabled by default or do I have to turn it on?
Encryption is on by default for all Big Sky Telecom accounts - there's no configuration required. TLS signaling and SRTP media encryption apply automatically to all calls made through our platform on compatible endpoints.
Does encryption affect call quality or latency?
No perceptible impact. SRTP encryption and decryption happens in hardware on modern IP phones and softphones. The processing overhead is negligible - call quality is determined by codec and network conditions, not encryption.
Is the encryption end-to-end for calls to mobile or landline numbers?
Encryption covers the leg between your device and our platform. When a call routes to a traditional PSTN number (mobile or landline), the PSTN leg is unencrypted - that's a limitation of the public switched telephone network, not our platform. For fully encrypted calls, both endpoints must be on an encrypted VoIP network.
What happens to encryption keys when a call ends?
Session keys are ephemeral and are discarded when the call terminates. This is perfect forward secrecy - even if a key were somehow compromised in the future, it could not be used to decrypt past call recordings. Each call generates a unique key pair.
Does call recording preserve encryption?
Call recordings are decrypted for storage (so they can be played back) and then re-encrypted at rest using AES-256. Access to recordings is controlled by role-based permissions in the management portal.
Can I get documentation of your encryption standards for a compliance audit?
Yes. We can provide a technical security overview document describing our encryption implementation, key management approach, and relevant protocol versions for inclusion in your compliance documentation. Contact our team to request it.
Ready for Encrypted Business Calling?
Every Big Sky Telecom plan includes SRTP and TLS encryption at no extra cost. Our team can provide a security overview document for your compliance audit - just ask.