Data Lineage in Malicious Environments

摘要: Intentional or unintentional leakage of confidential data is undoubtedly one the most severe security threats that organizations face in digital era. The threat now extends to our personal lives: a plethora information available social networks and smartphone providers indirectly transferred untrustworthy third party fourth applications. In this work, we present generic lineage framework Lime for flow across multiple entities take two characteristic, principal roles (i.e., owner consumer). We define exact guarantees required by such mechanism toward identification guilty entity, identify simplifying non-repudiation honesty assumptions. then develop analyze novel accountable transfer protocol between within malicious environment building upon oblivious transfer, robust watermarking, signature primitives. Finally, perform an experimental evaluation demonstrate practicality apply important scenarios outsourcing networks. general, consider , be key step towards achieving accountability design .