Trust is built based on guarantees, previous successful experiences, transparency and accountability. Yet, to-date, the technologies and frameworks necessary to raise confidence on cloud and Big Data applications is still lacking. It is crucial to create this confidence to encourage different business sectors to take up this technology and ultimately improve business efficiency and competitiveness. The ATMOSPHERE project focuses on this issue. ATMOSPHERE will provide a solution to assess trustworthiness of cloud applications dealing with data and support the development of more trustworthy cloud applications. Goal Provide a solution to assess trustworthiness of cloud applications dealing with data and support the development of more trustworthy cloud applications