En tête page de base

Secure communications

Secure communication chapô

Strong built-in security features

Linphone softphone and Flexisip server provide strong built-in security features,
based on open standards and state-of-the-art end-to-end encryption.

visual feature

Secure second zone

Secure user authentication and call setup

• Verification of the SIP server authenticity based on x509 certificates

• Verification of the user identity, using either SHA 256 digest authentication or TLS client certificates

• Secure connection between client (user) and server thanks to SIP TLS

End-to-end encryption for one-to-one and group messages

• Modern ciphering based on modern elliptic curves 448 and 25515

• Perfect forward secrecy with double ratchet algorithm

• Asynchronous messaging system based on pre-positioned keys

• Man-in-the-middle detection based on ZRTP auxiliary secret

End-to-end encryption for audio and video calls

• Audio/Video packets encryption using AES 128-bit and 256-bit key length

• State-of-the-art ciphering key exchange with ZRTP, using safe Elliptic Curves Diffie-Hellman (ECDH) X25519 and X448, and Short Authentication String (SAS) to prevent Man-in-the-middle attacks

• WebRTC-compatible end-to-end encryption with DTLS-SRTP

Secure storage

• Encrypted VFS (Encrypted Virtual File System) technology: all instant messages (text, documents, configuration data, etc.) are securely stored on the phone or desktop computer. This prevents a malicious application to access Linphone's data.

• Linphone application comprises specific views to visualize the received documents without the need to disclose them in clear-text to a third party application.

Download the brochure

Choose robust client and server software solutions

To build your secure communications service, you can leverage our long-term expertise
on end-to-end encryption for IM and VoIP.

schema linphone

Flexisip is a complete, modular and scalable SIP server suite comprising secure proxy and group chat functions. It offers all the features to deploy your own secure communications service tuned for mobile applications, out-of-the-box.

• Deployable on several hosts, for scalability and high availability
• On-premise, or in the cloud of your choice
• Integrated with push notifications systems, to never miss an iOS or Android call
• Installation and support services available

Secure communications

Primary tabs

Description:

Leverage our long-term expertise on secure user authentication and end-to-end encryption.

Your own value

We understand that you need to build your own value-added app to stay
at the forefront of secure communications technologies.

Dedicated support and customisation services

We offer dedicated annual support agreements, to ensure that your secure app stays compatible and compliant with the latest technologies.

Linphone is brandable and fully customisable. We can also develop specific security features on demand.

One cross-platform SDK for various kinds of UIs

Linphone features a separation bewteen the user interfaces and the core engine, allowing the creation of your own user interface.

Liblinphone SDK integrates all the voice, video and instant messaging functionalities with strong security features into a single easy-to-use API.

API plugin to add your own encryption engine

A custom encryption engine can easily be integrated without having to modify the library source code, as Liblinphone exposes APIs to enable customised code to process at all important stages.

Secure Communication Testimonials

We develop internally the source code of the full-stack software solution that we distribute,
which gives our customers full control of the solution that they chose.

Haavel Rein,

Head of Department

“We needed a complete library kit (SIP, RTP, codecs) to implement telephone communication functionality in our software […]. Linphone proved to be very stable.”

Visit Website

Soren Sennels,

CEO

“With Linphone and Flexisip you get a good head start for developing secure VoIP solutions. We believe that an active community and active developers are the best means of ensuring that the products remain secure.”

Visit Website

Henrique Corrêa da Silva,

CEO

“We have tested many VoIP stacks and libraries over the years, and Linphone was our first choice for SecurLine due to the quality, modularity and transparency of its code.”

Visit Website

Alber Arditi,

CEO

“Just because they know what they are doing. They are the masters of this subject.”

Logo menu mobile

Main menu

Menu Solutions

Menu technical corner

En tête page de base

Secure communications

Secure communication chapô

Secure second zone

Secure user authentication and call setup

End-to-end encryption for one-to-one and group messages

End-to-end encryption for audio and video calls

Secure storage

Download the brochure

Choose robust client and server software solutions

Secure communications

Primary tabs

Your own value

Secure Communication Testimonials

Footer mentions