Used in critical contexts, out-of-band communications contribute to protecting exchanges and ensuring the continuity of business activities for organisations in crisis situations.


An out-of-band communication refers to communications made outside of the usual networks. It uses reserved and secure channels to remain operational at all times. For example, in case of a cyberattack or a failure on the main network. In this out-of-band setup, the flows of audio, video, and data communications are generally encrypted end-to-end. This protects confidential or highly sensitive exchanges from any eavesdropping.

Use cases for out-of-band communications

Multi-factor authentication (MFA)

Multi-factor authentication involves verifying a user’s connection request before granting them access to a resource. To do this, it uses at least two factors, one of which typically involves an out-of-band communication. Indeed, after entering their credentials (first factor), the user will receive a verification request (second factor) on, for example, an encrypted application. To send this request, the MFA will use a different network. The aim is to limit the risk of data interception in the event of vulnerabilities on the network used for the initial connection.

Sensitive communications

Moreover, in the context of remote or hybrid work, collaborators use communication tools that are not always secure. However, within sensitive organisations, such as Essential Service Operators and Vital Importance Operators, protecting critical communications is a fundamental criterion. For their confidential online meetings, involving classified subjects or benefiting from a protective designation, the use of out-of-band communication systems is essential.

Business continuity

Furthermore, as European organisations are required to enhance their cybersecurity with the NIS 2 directive, crisis management and business continuity policies are becoming major topics. The deployment of out-of-band communication tools addresses these challenges. Indeed, in the event of a crisis, teams benefit from dedicated and secure communication channels. They can thus respond to incidents and ensure business continuity.

In public administrations, which rely on traditional communication means, the implementation of a communication system outside traditional networks has numerous benefits. It especially guarantees the continuity of public service.

Secure video conferencing for out-of-band communications

End-to-end encrypted secure video conferencing is suitable for setting up out-of-band communications internally. In sensitive contexts, collaborators particularly need to use a secure communication solution that is accessible at all times outside of traditional networks.

Tixeo offers a secure video conferencing solution, certified and qualified by ANSSI

Its end-to-end encryption, from client to client, prevents any interception of audio, video, and data exchanges, regardless of the number of participants in the online meeting.

In the on-premise version, the solution is deployed on a company’s dedicated server, without impacting the general network security policy. In case of a crisis, Tixeo can operate without an internet connection, isolated on the company’s infrastructure. This allows internal use only, for critical communications, and ensures the continuity of activities. Secure video conferencing thus helps to strengthen the cyber-resilience of organisations.

Finance: why is secure video conferencing your ally in crisis management?