AUTHOR=Nehme Mayssam , Kaiser Laurent , Gillet Philippe , Thevoz Philippe , Stringhini Silvia , Guessous Idris TITLE=Digital COVID Credentials: An Implementation Process JOURNAL=Frontiers in Digital Health VOLUME=3 YEAR=2021 URL=https://www.frontiersin.org/journals/digital-health/articles/10.3389/fdgth.2021.594124 DOI=10.3389/fdgth.2021.594124 ISSN=2673-253X