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白宫是如何存储机密文件的?
随着美国总统特朗普与乌克兰总统的通话记录公布,外界得以一窥可能比机密文件本身更加机密的白宫文件分类法。根据《总统档案法》,从总统的Twitter私信、备忘便签到通话,其执行公务时的一切都要被记录,然后被归入非机密、机密、绝密和加密四大类别。其中加密类别的系统和服务器都是单独的,绝大多数安全官员没有获取权限。《华尔街日报》邀请美国国家安全委员会的一位前官员讲解了分类的原则、流程,以及为何错误分类会引 ...
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