public static String generateConfirmNum()//called by socketProtocol
	{
		boolean newConfirmNum = false;
		String confirmNum = SellerBackEnd.generateRandom();
		
		while(newConfirmNum == false)
		{	
			if (allConfirmNumbers.contains(confirmNum))
			{
				confirmNum = SellerBackEnd.generateRandom();
			}else{
				allConfirmNumbers.add(confirmNum);
				newConfirmNum = true;
			}
		}
		
		return confirmNum;
	}