阐述数字化校园的历史背景以及其面临的信息安全问题。
Describes the backgrounds of the digital campus, and introduces what the information security issues faced.
比方说，2004年，谷歌开始Google Book项目，提出要将全球信息组织起来并对历史上所有印刷过的书本进行数字化，这是一个巨大挑战。
For example, in 2004, Google started its Google books project and set forth a challenge to organize all the world's information and digitize all the books ever printed in history.
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