. 2022 Aug 16;22(16):6133. doi: 10.3390/s22166133

Table 2.

Notation table for abbreviations used in the framework.

No.	Term	Description
1.	DT	Digital Twin
2.	$D T_{1}$	Production Floor Digital Twin
3.	$D T_{2}$	Raw Material Management Digital Twin
4.	$D T_{3}$	Assembly Line Digital Twin
5.	$D T_{4}$	Packaging and Warehousing Digital Twin
6.	HTTPS	Hypertext Transfer Protocol Secure
7.	SSL	Secure Socket Layer
9.	UDP	User Datagram Protocol
10.	IP	Internet Protocol
11.	PA	Packet Auditor
12.	$P A_{I D}$	Packet Auditor ID
13.	$T x n$	Transaction
14.	$C e r t_{D T}$	Digital Twin Certificate
15.	$P_{P u b K}$	Packet Auditor Public Key
16.	$P_{P r v K}$	Packet Auditor Private Key
17.	$D T_{p u b K}$	Digital Twin Public Key
18.	$D T_{p r v K}$	Digital Twin Private Key
19.	$P r o f_{D T}$	Digital Twin Profile
20.	$D_{I D}$	Device ID
21.	$I P s r c_{n}$	IP Packet Source
22.	$I P d s t_{n}$	IP Packet Destination
23.	$t s t m p_{n}$	Timestamp of captured packet
24.	$b d_{u p p e r}$	Upper Time Boundary
25.	$b d_{l o w e r}$	Lower Time Boundary
26.	$P T$	Physical Twin
27.	DL	Deep Learning
28.	ACK	Acknowledgement Packet
29.	SYN	Synchronize Packet
30.	C&C	Command and Control
31.	LSTM	Long-Short-Term Memory