private JPanel getPanCentre() {
		if (panCentre == null) {
			panCentre = new JPanel();
			panCentre.setLayout(new BoxLayout(panCentre,BoxLayout.Y_AXIS));
			panCentre.add(getPanClair());
			panCentre.add(getPanCrypte(), null);
		}
		return panCentre;
	}