Secure, persistent server side variables?

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7 
//server
//create global session object
Sessions = {}
//on each connection to the server
Meteor.onConnection(function(connection){
	//instantiate a dictionary labeled with the connection's unique id.
	Sessions[connection.id] = {clientData:{}, time: Date.now()};
	connection.onClose(function(){
		//forget the client when they leave
		delete Sessions[connection.id]
	})
})