ISTANBUL Public officials in France, without exception, are now required to use the state-owned instant messaging service Tchap, daily Le Figaro reported Monday. Starting Monday, all French state employees and ministries are obliged to switch to the secure state-owned instant messaging service Tchap for exchanging official communications. The circular signed by Prime Minister Francois Bayrou in the summer required all public officials, including members of ministerial Cabinets, to install the