Abstract: The present description concerns a computer system for generating certified data, comprising an electronic device (2) equipped with an apparatus (21) for acquiring visual and/or sound data, a locator (22) and a memory (23), said device (2) being configured to establish a GSM network connection (24), a computer program (3) residing in said memory (23), said program (3) being configured to start the apparatus (21), acquire visual and/or sound data and, during the data acquisition step (31), start the locator (22) and acquire a location of the device (2), a system database (4), a first server (5) and a second server (6), which are managed by a first certification body and a second certification body respectively to certify said acquired visual and/or sound data.