Securing data accountability in decentralized systems

Securing Data Accountability in Decentralized Systems

We consider a decentralized setting in which agents exchange data along with usage policies. Agents may violate the policies, although later on auditing authorities may verify the agents’ accountability with respect to the used data. Using (provably secure) time-stamping and signature schemes, we design and analyze an efficient cryptographic protocol that generates the sufficient communication ...

Exploring the Functioning of Decision Space: A Review of the Available Health Systems Literature

Background The concept of decision space holds appeal as an approach to disaggregating the elements that may influence decision-making in decentralized systems. This narrative review aims to explore the functioning of decision space and the factors that influence decision space.   Methods A narrative review of the literature was conducted with searches of online databases and academic journals ...

Securing history: Privacy and accountability in database systems

Databases that preserve a historical record of activities and data offer the important benefit of system accountability: past events can be analyzed to detect breaches and maintain data quality. But the retention of history can also pose a threat to privacy. System designers need to carefully balance the need for privacy and accountability by controlling how and when data is retained by the sys...

A Logic for Auditing Accountability in Decentralized Systems

We propose a language that allows agents to distribute data with usage policies in a decentralized architecture. In our framework, the compliance with usage policies is not enforced. However, agents may be audited by an authority at an arbitrary moment in time. We design a logic that allows audited agents to prove their actions, and to prove their authorization to posses particular data. Accoun...

Decentralized Interaction Estimators in Large Scale Power Systems with Neural Networks.