中文摘要：

云计算作为一种新兴的共享基础架构方法，应用范围逐渐扩大。首先概述了云计算环境下数字图书馆的概念、特点、原理；然后讨论了“云”图书馆在安全性上的利弊；最后结合云计算特点，研究了“云”数字图书馆安全架构，并制定了相应的安全策略。

英文摘要：

Cloud computing is a new method sharing infrastructure which provides the usage of service. Firstly, the concepts, characteristics and principles is described for the digital library based on cloud computing in this paper. And then, we provides a high-level discussion of the fundamental challenges and benefits of digital library under the cloud computing secttrity. Finally, the basic concept and characteristic of cloud computing, combined with the characteristics of cloud computing, study of establish the appropriate framework for digital libraries cloud computing security, and to develop appropriate security policies.