From: "Yu Hu" To: "Adriana Iamnitchi" Subject: Summary for last class ( YU HU & Mindy ) Date: Thursday, May 23, 2002 11:29 PM Summary ( YU HU & Mindy ) On paper: Distributing Trust on the Internet. We discuss issues: 1. What is Byzantine Agreement ? 2. What is the difference between randomized Byzantine Agreement with standard Byzantine Agreement? 3. What is the difference between multivalued Byzantine Agreement with binary Byzantine Agreement? 4. Threshold Cryptograph is very interesing for distributin trust on set of severs In next class: We will discuss more about Byzantine Agreement which is really important for distributed systems' security. On paper: Fundamentals of Fault-Tolerant Distributed Computing in Asynchronous Environments We discussed issues: 1. Because this paper doesn't concern with the security issues. So we discussedthis issue in fault-tolerant distributed computing because they're very important nowadays. How to deal with authentication, access control and other security problems? Are traditional ways to ensure security in non fault-tolerant or centralized computing systems still applicable in this kind of system? 2.Difference between redudancy and replication 3.What's the meaning of space redundancy and time redundancy 4.What fault detecation mechanisms are used in practice? 5.Consensus in fault tolerant distributed system