By Julien Ponthus and Pamela Barbaglia LONDON (Reuters) – Advent International is looking to sell its French biometrics and fingerprint identification firm IDEMIA in a deal worth up to $4.6 billion as it seeks to capitalise on growing demand for cybersecurity assets in Europe, two sources told Reuters. The U.S. buyout fund is reviewing a series of options to sell IDEMIA, including a possible break-up of the company which was formed in 2016 by combining Safran’s identity and security business with Oberthur Technologies, the sources said. The move comes as governments around the world have stepp…