How can Managed Identity and Key Vault be combined to eliminate hard-coded secrets from Azure applications?
Question
Learn how Azure Managed Identity and Azure Key Vault can work together to securely manage application secrets without embedding credentials in source code or configuration files.
Explore how applications can authenticate using managed identities and securely retrieve secrets, certificates, or keys from Key Vault.
Understand the enterprise security benefits of least privilege, secret rotation, centralized management, and reduced credential exposure.
An essential topic for Azure developers, cloud engineers, DevOps professionals, and solution architects building secure applications.
Answers
A secure Azure application should avoid storing passwords, client secrets and connection credentials directly in source code or configuration files. Managed Identity allows an Azure workload to authenticate using its Microsoft Entra identity, while Azure Key Vault provides centralized storage for secrets and sensitive configuration.
A common architecture is:
Azure App Service → Managed Identity → Microsoft Entra ID → Key Vault → Secret
The application therefore doesn't need a hard-coded Key Vault password. Access is controlled through Azure identity and authorization.
For example, an ASP.NET Core application can use its managed identity to retrieve a database credential or other sensitive configuration from Key Vault. The same principle can be extended across Functions, App Service, containers and other Azure workloads.
Practical project: Build an ASP.NET Core application using App Service Managed Identity and Key Vault, remove all credentials from appsettings.json, and demonstrate how access is controlled through Azure permissions.