Digital identity becomes a great challenge for everyone today. We have to manage our data with an high level of numeric skills. Networks, energy footprint, eReputation, third-party web tracking, big data, ciphering, obfuscation, dolphin attack, avatar, IOT, IP port mirroring are the new numeric keywords we have to understand. This investigation will be based on experimentations to carry out the best reading about this subject. Autonomy, creativity, collaboration, communication and exchange are the capacities we want to spotlight in this project. This is an Eramus+ project with 3 European schools. In France, we carry out this project during the technical courses.