认证和标识系统与所调用的服务一起提供上下文，当调用服务时，该上下文用来发现恰当的合同。
Authentication and identity systems provide the context used to discover the appropriate contract when the service is invoked, along with the invoked service itself.
对畜产品建立可追溯系统关键技术，动物标识技术、第三方认证、信息在食品供应链中的传递进行阐述。
The key technology of traceable management for foods, including identification of livestock, quality assurance certification and information flow in the whole food supply, were demonstrated.
为实现信息系统的安全目标，需要系统能够提供相关的安全服务：身份标识与认证服务、授权与访问控制服务、非否认服务、机密性服务、完整性服务。
Services such as identification and authentication, authority and access control, non-deniability, confidentiality and integrity are the key elements for the security of the information system.
现今有三种认证系统：公钥基础设施(PKI)、基于标识的加密系统(IBE)和组合公钥系统(CPK)。
There are three authentication systems now: Public Key Infrastructure (PKI), Identity-Based Encryption (IBE) and Combined Public Key (CPK).
客户仅能使用与基于服务的有关管理系统认证认可方案一致的，内涵DNV商标的认证标识。
Customer may only use the Certification Mark where the DNV logo is embedded corresponding to the Management System Certification Scheme the Services are based on.
客户仅能使用与基于服务的有关管理系统认证认可方案一致的，内涵DNV商标的认证标识。
Customer may only use the Certification Mark where the DNV logo is embedded corresponding to the Management System Certification Scheme the Services are based on.
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