数据加密是企业级移动设备重要的功能，防止数据被未经授权的用户或应用程序所访问。谷歌从Android3.0开始提供磁盘加密解决方案。但它只对内部存储设备进行加密。本文基于eCryptFS方法提出了对Android系统内部和外部存储设备都进行数据加密的整体方案，同时也提供了对Android应用程序级的数据加密方法，提升了Android移动设备的安全性。%Data encryption is an important enterprise use case which can prevent data from being exposed to unauthorized users or applications. From Android 3.0, Google begin providing disk encryption solution on Android. But it only targets to internal storage on Android devices. Based on eCryptFS, this paper gives out new data encryption mechanism to encrypt user’s data on internal and external storage of Motorola’s Android devices. It also provides application level data encryption mechanisms, and enhances the safety of user’s data on Android devices.
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