US called to disclose secret court's order on Yahoo email search

A US senator and civil groups critical of surveillance practices on Friday called on the government to release a 2015 order by a secret court directing Yahoo to scan all its users' incoming email, saying it appeared to involve new interpretations of at least two important legal issues.
Their concerns center on the nature of the technical assistance the court required Yahoo to provide and the scope of the search that legal experts said appeared to cover the Silicon Valley internet company's entire network.
Yahoo installed a custom software program to search messages to hundreds of millions of accounts at the behest of US intelligence officials with an order from the Foreign Intelligence Surveillance Court, a secret tribunal, Reuters reported on Tuesday.