要获得由权威认证机构签名的官方数字证书，需要生成一个公开-私有密匙对并使用公开密匙生成证书请求。
To get an official digital certificate signed by a recognized certificate authority, you need to generate a public-private key pair and use the public key to create a certificate request.
服务提供者过滤器使用提供的签名来检查服务请求者的认证，并在万一没有认证的情况下给出一个SOAP错误(SOAP Fault)响应。
The service provider filter checks authentication of the service requestor using the supplied signature and a gives a SOAP Fault response in case of none authentication.
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