Hearing system, devices and method of securing communication for a user application

A method performed by a server device for securing communication with a user accessory device having a user application, the method comprising:

• obtaining challenge data in the server device;
• transmitting the challenge data from the server device to the user accessory device;
• receiving a response data from the user accessory device;
• verifying the response data in the server device based on the challenge data;
• and
• approving the user application by the server device if the response data is successfully verified, and setting a user application status identifier to a value indicative of the user application not being approved if the act of verifying the response data results in a failed verification.

A server device for securing communication with a user accessory device having a user application, comprising:

• a communication interface configured to communicate with the user accessory device;
• and
• a processing unit coupled to the communication interface;
• wherein the processing unit is configured to:
• obtain challenge data;
• transmit the challenge data to the user accessory device;
• receive a response data from the user accessory device;
• verify the response data based on the challenge data;
• and
• approve the user application if the response data is successfully verified;
• and
• wherein the processing unit is configured to approve the user application by setting a user application status identifier to a value indicative of the user application being approved.