The passport check at immigration is the equivalent of the login (handing over the passport) and authentication (checking the identity in a database at the location).
移民局对护照的检查就等价于登录（递交护照）和身份验证（在某处、在数据库中检查标识）。
MS Passport is built on.net and shows how a Web service in general can be used for authentication.
MS Passport构建在。NET之上，并且展示了一般的Web服务如何用于认证。
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