Trust is indispensable to the prosperity and well-being of societies. For millennia, we developed trust-building mechanisms to facilitate interactions. But as they become increasingly digital, many traditional mechanisms no longer function well, hence trust breaks down. As a result, low levels of trust discourage us from engaging in new forms of interactions and constrain business opportunities. We must therefore invent trust mechanisms that will contribute to prosperous and peaceful societies in the digital age, and Artificial Intelligence could clearly contribute to implement trust in the digital world.