关于Actility平台appKeyEncryptionMode字段含义的技术咨询

Great question—let's break this down clearly based on ThingPark's internal mechanisms and common LoRaWAN platform security practices, since the official docs don't explicitly cover the appKeyEncryptionMode field.

What is appKeyEncryptionMode and its purpose? #

The appKeyEncryptionMode field in the API response indicates the encryption method ThingPark uses to secure your application key (appKey) during storage and API interactions.

For the value LRC_CLUSTER_KEY you're seeing:

• LRC stands for LoRaWAN Root Cluster, a core security component in ThingPark's infrastructure.
• This mode tells you that your plaintext appKey is encrypted using the platform's cluster-level root key before being stored in ThingPark's databases.
• Its primary purpose is to prevent unauthorized access to sensitive key material—even if there's a breach of the platform's storage layer, the exposed keys would be encrypted and useless without the cluster root key.

Why does the returned appKey differ from the one I submitted? #

Yes, this discrepancy is directly caused by the LRC_CLUSTER_KEY encryption mode.

When you submit a plaintext appKey during device registration:

1. ThingPark immediately encrypts it using the cluster root key instead of storing the plaintext value.
2. The API response returns this encrypted version of the appKey rather than your original plaintext input.
3. This is a deliberate security measure to ensure that sensitive key material never travels over the wire or exists in plaintext form within the platform's systems after processing.

If you need to use the appKey for device communication later, you don't need the encrypted version returned by the API—you should retain the original plaintext appKey you submitted during registration, as that's what the device will use for LoRaWAN session encryption.

内容的提问来源于stack exchange，提问作者eliasw