By Tom Wilson and Elizabeth Howcroft LONDON (Reuters) – A new front has emerged in Israel’s fight against the funding of Iran-backed militant groups from Hamas to Hezbollah: A fast-growing crypto network called Tron that until recently attracted less scrutiny than Bitcoin. Quicker and cheaper than Bitcoin, the Tron network has overtaken its rival as a platform for crypto transfers associated with groups designated as terror organizations by Israel, the United States and other countries, according to interviews with seven financial crime experts and blockchain investigations specialists. A Reut…