Combiner Driven Management Models and Their Applications

摘要

In this paper, we will study the question of performing arbitrary updates in secret sharing schemes when shares of unaffected parties shall remain unchanged. We will introduce a new phase in the lifetime of secret sharing schemes to simplify constructions of multi-time secret sharing schemes and propose management models that allow unlimited updates from arbitrary schemes without need for broadcasts. As an example, we give an implementation based on Shamir's threshold scheme.