網格認證是網格安全的重要組成部分，是對網格實體身份有效性進行確定的過程。網格環境下虛擬組織為認證提出了新的要求。介紹了網格環境下虛擬組織的特點，闡述了網格認證的基本要求，分析了幾項常用的認證技術不適合多結點網格認證的原因，在此基礎上分析了Globus 項目中基于GSI 認證的相關技術及概念。網格技術是一項不斷發展的
技術，網格認證也處于不斷完善之中。
關鍵詞：虛擬組織；GSI；相互認證；代理；授權;
Abstract: Grid authentication is an important component of Grid Security, and is the confirmation process of grid entity's identity validity. The virtual organization has put forward the new demand for authentication under the grid environment. Introducing the characteristic of virtual organization which under the grid environment, illustrating the basic demand of grid authentication, analyzing reasons of several commonly used authentication technology which does not suit to multi-sites grid authentication, analyzing the relevant technologies and concepts based on GSI authentication of Globus project. Grid technology is a developing
technology; grid authentication is in perfecting constantly too.
Key words：virtual organization; GSI; mutual authentication; proxies; delegation；