该体系通过标准的接口为电子商务提供必须的保密、完整、认证和不可否认服务。

The system provides the necessary services of confidentiality, integrity, authentication and non-repudiation fore-commerce by the standard API.

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信息系统中的安全性问题主要包含身份认证服务、访问控制服务、数据保密服务、数据完整牲服务和不可否认服务等几个方面。

The security problems of information systems include identity authentication service, access control service, data secrecy service, data integrality service, non-negation service, etc.

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起初，FriendFeed 也许是复制模仿某些服务，但不可否认，如今它是最顶级的社会化聚合网站，并且其服务聚合了大量的内容。

While FriendFeed may be a duplicator in some ways of other services before its inception, there's no denying that it's now the top social aggregator and a service that's gaining a lot of steam.

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