Sharing sensitive data is a specific challenge within EOSC-Life as well as the broader biomedical community. For that reason, a toolbox is developed in WP4, providing references and links to recommendations, procedures, and best practices, as well as to software tools. As a first step, a tagging (categorisation) system has been developed and published, allowing consistent labelling and categorisation of resources most relevant to sensitive data sharing. In the next weeks, this categorisation system will be evaluated in a pilot study by 6 research infrastructures.