Non-repudiation: any access to customer data is logged, while retaining the main benefits of a public storage service.

不可否认性：任何对客户数据的访问都会被记录，同时还保留了公有存储服务的主要优势。

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It is necessary to apply some security to ensure security service of confidentiality, integrity, authentication and non-repudiation for the Internet application.

为了保障网络上数据的机密性、完整性和不可抵赖性，必须要有相应的设施来提供服务。

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