It is used to control and indicate if the communication is encrypted. True indicates communication is currently encrypted, false unencrypted.

'Declaration
 
Property EncryptionEnabled As Boolean

'Usage
 
Dim instance As ITcpipSession2
Dim value As Boolean
 
instance.EncryptionEnabled = value
 
value = instance.EncryptionEnabled

bool EncryptionEnabled {get; set;}

property bool EncryptionEnabled {
   bool get();
   void set (    bool value);
}