加密服务提供者。
加密可以保证有关某个主题的数据机密性，原因是只有拥有正确私钥的服务提供者才能正确执行解密，因此也能读懂该数据。
The encryption guarantees the data confidentiality on the topic, because only the service provider owning the right private key can perform decryption correctly and, thus, understand the data.
ESB和提供者服务之间的链路可能由网络体系结构、ESB凭据或使用PKI 的加密进行保护。
The link between the ESB and provider services may be secured by network architecture, by ESB credentials or by encryption using PKI.
如果能使所有的客户端和服务提供者加入相同的kerberos域，然后当ApplicationServer支持时，Kerberos协议就可提供该场景下的加密密钥。
If all clients and service providers can be made to join the same Kerberos realm, then, when Application Server supports it, Kerberos protocols could provide the encryption keys in this scenario.
因为我们现在具有多个服务提供者，这就出现了问题：您将使用谁的公钥来进行加密？
Because we now have multiple service providers, the question is: whose public key are you going to encrypt with?
例如，如果服务提供者的安全策略声明要求使用加密消息，则ESB可以自动配置一个encryption中介。
For example, if a service provider's security policy declaration requires encrypted messages, the ESB can configure an encryption mediation automatically.
用于数据加密的密钥是使用带有与服务提供者（Service Provider）的 X.509证书相关联的公钥的非对称算法进行加密的。
The key used for the data encryption is encrypted itself using an asymmetric algorithm with the public key associated with the Service Provider's X.509 certificate.
用于数据加密的密钥是使用带有与服务提供者（Service Provider）的 X.509证书相关联的公钥的非对称算法进行加密的。
The key used for the data encryption is encrypted itself using an asymmetric algorithm with the public key associated with the Service Provider's X.509 certificate.
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