中文摘要：

在信息和服务爆炸的时代，分布式的信任评估技术作为一种新的解决方案，引起了广泛关注并取得了许多重要成果。针对分布式信任评估中的难点与关键点，在介绍现有模型的解决手段时，指出了目前仍遗留的一些问题。

英文摘要：

Trust is one fundamental relationship in real world.Distributed trust computing is becoming a hotspot with the development of information technology.Some typical trust models are surveyed and discussed.This paper attempts to point out some deficiencies of those models and the remaining problems.