In this paper, we focus on the problem of secure multicast in dynamic groups. In this problem, a group of users communicate using a shared group key. Due to the dynamic nature of these groups, to preserve secrecy, it is necessary to change the group key whenever the group membership changes. While the group key is being changed, the group communication needs to be interrupted until the rekeying...

The paper presents a new reliability-evaluation method to distribution system, based on interval analysis. In this method, the available capacity of feeder is defined and is considered when evaluation the loadpoint reliability. By utilizing the minimal-path method, the element is divided treatment principle is established. The basic interval formulas for the load point are presented, considerin...

What do you do to start reading software testing management life on the critical path? Searching the book that you love to read first or find an interesting book that will make you want to read? Everybody has difference with their reason of reading a book. Actuary, reading habit must be from earlier. Many people may be love to read, but not a book. It's not fault. Someone will be bored to open ...

Reworking in developing software exists widely in IT project management. But the current estimating methods on project duration cannot deal well with this problem. In this paper, some key concepts, such as adjusted activity, adjusted GERT network, expected project duration, expected critical path, are firstly defined. Then authors study estimating method on project duration for different rework...