This document summarizes a research paper on data security in distributed systems. It begins by defining distributed systems and client/server systems. It then discusses some of the general problems with data security management in these systems, such as unsecure login processes and users not changing passwords regularly. Finally, it proposes a model for an access security system for distributed systems that includes an access security server with communication, session, and application layers to manage authentication, authorization, and access controls for users and systems.