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1		- **Contents： **
2		-
3		-{{toc/}}
4		-
5	5	= 1. Introduce =
6	6
7	7	A standard LoRaWAN packet via UDP packet forward to LoRaWAN server is AES128 encryption. In this chapter, we will show how this packet looks like in the server and see the possibility to get the content of this packet.
8	8
9		-[[image:image-20220527085838-1.png]]
	5	+[[image:https://wiki.dragino.com/images/thumb/3/36/Unencrypt_Network_3.png/600px-Unencrypt_Network_3.png||height="476" width="600"]]
10	10
11	11	Unencrypt Network modified from LoRaWAN
12	12
13		-
14	14	= 2. Analyze the LoRaWAN packet =
15	15
16	16	If the gateway is connected to LoRaWAN server via UDP packet fordward. We can set the server address to a UDP server to get the LoRaWAN packets.
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27	27	Analyze the data
28	28
29	29	(((
30		-From above screen shot, we can see most of the meaning except this** "data":"QHxqASaAygwCXrumS1oFsgRq"**. This is the AES128 encryption data we mention above, it is base64 format. To decode this data, we need to have the APP Session Key and Network Session Key of this end node. If we have these two keys, we are able to decode this packet by some LoRaWAN decode website like: [[LoRaWAN Decode Website>>url:https://lorawan-packet-decoder-0ta6puiniaut.runkit.sh/]].
	25	+From above screen shot, we can see most of the meaning except this "data":"QHxqASaAygwCXrumS1oFsgRq". This is the AES128 encryption data we mention above, it is base64 format. To decode this data, we need to have the APP Session Key and Network Session Key of this end node. If we have these two keys, we are able to decode this packet by some LoRaWAN decode website like: [[LoRaWAN Decode Website>>url:https://lorawan-packet-decoder-0ta6puiniaut.runkit.sh/]].
31	31	)))
32	32
33	33

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1		-XWiki.Xiaoling

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