Yahoo Inc. last year secretly built a custom software program to search all of its customers incoming emails for specific information sought by U.S. intelligence officials, according to people familiar with the matter.据知情者称之为，雅虎公司去年秘密自定义软件程序，对所有用户的接管邮件展开搜寻，协助美国情报官员找寻特定信息。The company complied with a classified U.S. government directive, scanning hundreds of millions of Yahoo Mail accounts at the behest of the National Security Agency or FBI, said two former employees and a third person apprised of the events.两名前雅虎雇员和熟知这一事件的另外一个人说道，雅虎按照一份美国政府的机密指令，不应美国国家安全局或联邦调查局的拒绝，对数千万用户的电邮展开扫瞄。Some surveillance experts said this is the first known case of a U.S. internet company agreeing to a spy agencys demand by searching all arriving messages, as opposed to examining stored messages or scanning a small number of accounts in real time.一些监督专家说道，这是第一次经常出现美国网络公司拒绝接受情报机构的拒绝，对所有接管邮件展开搜寻，而不是意味着检查储存信息或即时扫瞄少量账号。It is not known what information intelligence officials were looking for, only that they wanted Yahoo to search for a set of characters. That could mean a phrase in an email or an attachment, said the sources, who did not want to be identified.目前还不确切，情报官员找寻的是些什么信息，只告诉他们拒绝雅虎搜寻特定字样。

不愿透漏姓名的知情者说道，搜寻内容有可能是邮件或附件中的某个词组。

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