Dedicated to the memory of Dorrie Weiss.

Building support for delegation services into an identity federation system enhances its flexibility and scalability. Users may need to delegate all (or a subset) of their access rights or privileges to other parties in the system. However, the Liberty Alliance, an industry consortium that aims to build open standard-based specifications for identity federation systems, does not include delegat...

Capturing races or semeai are an important element of Go strategy and tactics. We extend previous work on semeai [1] by introducing a more general framework for analyzing semeai, based on the new concepts of conditional combinatorial games and liberty count games. We show how this framework encompasses earlier concepts such as plain liberty regions and plain eye regions. Furthermore, we discuss...