CARDS - Collaborative Audit and Report Data Sharing for A-Posteriori Access Control in DOSNs

Accountability and transparency have been commonly accepted to deter bad acts and to encourage compliance to rules. For this, auditing has been largely, and since ancient times, adopted to ensure the well running of systems and businesses within which duties are governed by set rules. Recently, an a-posteriori approach to data access control has been investigated for information systems as well across number of critical domains (e.g., Healthcare systems). Besides, privacy advocates started calling for the necessity of accountability and transparency in managing users´ privacy in nowadays connected and proliferated web data. Following this line of thought, we suggest a system for collaborative a-posteriori access control to data dissemination in decentralized online social networks based on reporting and auditing. We demonstrate the usability of our suggested model using a real OSN graph.