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IoT Hub
DocumentationIoT HubDeveloper ManualDevice AuthenticationOverview
Overview
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Last updated: 2024-12-27 15:44:26
Overview
Last updated: 2024-12-27 15:44:26
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IoT Hub assigns a unique product ID to each created product. You can customize the Devicename to identify devices and use the product ID + device ID + device certificate/key to authenticate devices. You need to select the device authentication method when creating a product. During connection, a device needs to report the information of the product, device, and corresponding key according to the specified method and can be connected to IoT Hub only after successful authentication. As different users have different requirements for device resources and security levels, IoT Hub provides multiple authentication schemes to meet the needs in different use cases.
IoT Hub provides the following three authentication schemes:
Certificate authentication (device-level): it assigns a certificate + private key to each device and uses asymmetric encryption to authenticate the access. You need to burn different configuration information for each device.
Key authentication (device-level): it assigns a device key to each device and uses symmetric encryption to authenticate the access. You need to burn different configuration information for each device.
Dynamic registration authentication (product-level): it assigns a unified key to all devices under the same product, and a device gets a device certificate/key through a registration request for authentication. You can burn the same configuration information for the same batch of devices.
The three schemes have their own pros and cons in terms of ease of use, security, and device resource requirement. You can comprehensively evaluate them and choose the most appropriate one according to your own business scenarios. They are as compared below:
Feature
Certificate Authentication
Key Authentication
Dynamic Registration Authentication
Burned device information
ProductId, Devicename, device certificate, and device private key
ProductId, Devicename, and device key
ProductId, Devicename, and ProductSecret
Whether device creation is required
Yes
Yes
Devices can be automatically created according to the Devicename carried in the registration request.
Security
High
Average
Average
Use limit
Up to 1 million devices can be created under one product.
Up to 1 million devices can be created under one product.
Up to 1 million devices can be created under one product. You can customize the maximum number of devices automatically created through registration requests.
Device resource requirement
High, with TLS support required
Low
Low, with only AES support required.
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