Azure Service Bus security
As Azure Service Bus is described as an enterprise-level cloud service designed for integrating different services, there are serious expectations regarding the security features it offers. Besides shared access tokens, there are new features that allow much more flexible access management.
The first option described will be Managed Identity (MI), which can be considered current state-of-the-art (SOTA) when developing solutions based on Microsoft Azure.
MI
MI is a feature of Microsoft Azure cloud that eases authentication between services without storing credentials in your code. A whole description can be found in the link in the Further reading section. When it comes to using it with Azure Service Bus, there is no additional blade available—what you need is to just find an identity in the access control (IAM) blade, as illustrated in the following screenshot: