🔑Step 2: Identify the keys

Each device has a unique combination of security keys that are used by the LNS to identify the device and provide access to the data being sent via LoRa. TWTG will send these keys in an encrypted file alongside the shipment confirmation after purchase.

The file will contain the following information:

• Serial Number

• devEUI

• appEUI/joinEUI

• appKey

From LoRaWAN 1.0.4 appEUI is known as joinEUI

The devEUI and the appKey will be requested by the LNS when adding a device. The appEUI/joinEUI is only needed for end-to-end encryption between the device and the application server, and therefore should not be entered in the LNS but in the application server. This is not mandatory, therefore in many situations, the appEUI/joinEUI is not needed at all. It is only needed when LNS and join server are separated and the application server does not trust the LNS.

Please note that for security reasons TWTG will avoid sending the keys more than once. It is recommended that the user store these keys in a safe and documented location.

Examples of the key file

Transmitter ser. no.	type	devEUI	appEUI/joinEUI	appKey
TT0123AA00001	DS-TT-01-01	848BCD612345678	848BCDFFFEEEFFAB	7A4DFAA5F47A5C3A53FB349670D5B2AF
TT0123AA00002	DS-TT-01-01	848BCD600000000	848BCDFFFEEEFFAC	7A4DFAA5F47A5C3A53FB349670D5B2AE