Announcement: This status message affects all Multiple Authentication Broker (MAB ) users who currently use the old ETSI Signing Interface from the All-In Signing Service (AIS). On February 12, 2026 EoB, these users will be configured by AIS to the new Selected Signing Service (SSS).
Impact: This is a configuration change on the Swisscom side only. This change should not trigger any need for action on the partner side. Nevertheless, we ask all partners to note the information below and to take appropriate measures. The work will be carried out without interruption.
Note: If your integration conforms to our specifications, no action is required. Bellow you will find a description of a possible source of problems that should be checked to be on the safe side:
Is the "AUD" parameter from the Signing Access Token being used to address the correct Signing Endpoint? This should not refer to the "hardcoded" AIS endpoint ("https://ais.swisscom.com/AIS-Server/rs/v1.0/sign") in your signing application, but should be taken dynamically from the received Signing Access Token (SAD, in the parameter: "AUD") and applied. Further information on this can be found in the MAB Integration Guide (page 130) or the Quick Guides in the partner area. Example of the PAR request, under §4. Link to the Quick GuideNecessary actions: No action required on the part of the partner if the instructions given have been observed and implemented.
Contact: Support for Swisscom Trust Services Partners(LINK)