Disallowing Unauthorized State Changes of Distributed Shared Objects

摘要

Attaching digital signatures to state update messages in global dis-tributed shared object (DSO) systems is not trivial. If the DSO consists of a number of autonomous local representative that use open, public networks for maintaining the state consistency, allowing a local repre-sentative to sign state update messages is not appropriate. More so-phisticated schemes are required to prevent unauthorized state updates by malicious local representative or extenal parties. This paper exam-ines the problem in detail, compares a number of possible solutions, and identifies the most suitable one and demonstrates how the state update messages can be signed using the identified solution.