[ns] (using ns-2.31) i want to introduce encryption when a node sends data

[Sheraz Nadeem]

Hi all there, i want to introduce encryption in the communication between two or more nodes. it is a wireless ad hoc scenario and there is an intruder who want to hack the communication between them and then after introducing the encryption the data becomes secure. so tell me how i can do it. i want to do it as soon as i can. but guide me i am a  new ns user. thanks 
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