Abbreviation	Meaning
BS	Base Station
CH	Cluster Head
CH’	Compromised Cluster Heads
CM	Cluster Members
CN	Cluster Node
CSMA/TDMA	Carrier Sense Multiple Access/Time Division Multiple Access
d	Distance
EI	Energy Indicator
IDSs	Intrusion Detection Systems
IR	Intrusion Ratio
J	Joules
k	Message Bits
LEACH	Low-Energy Adaptive Clustering Hierarchy
MAC	Message Authentication Code
MIT	Massachusetts Institute of Technology
N	Network Size
Nbrpk	Number of Packets Sent to The CH
NC	Number of Cluster Heads Within A Round
NC’	Number of Compromised CHs [Attackers] Within A Specific Round
NO-DATA-PKT	Number of Data Packets Received by a CH
NS2	Network Simulator Tool Version 2
PDR	Packet Delivery Ratio
PKT	Packet
RPK	Random Pairwise Keys
RSSI	Received Signal Strength Indicator
S	Seconds
SCH	Second Cluster Head
SE	Software Engineering
SDLC	Software Development Life Cycle
TDMA	Time Division Multiple Access
WSNs	Wireless Sensor Networks