纵向加密认证能够实现（    ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69407' and id < 4493861 and id<>'4493861' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69407' and id > 4493861 and id<>'4493861' order by id asc limit 5