For Israel, losing control of its data to authorities overseas was a significant concern. So to deal with the threat, officials created a secret warning system: the companies must send signals hidden in payments to the Israeli government, tipping it off when it has disclosed Israeli data to foreign courts or investigators.

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The strict controls include measures that prohibit the US companies from restricting how an array of Israeli government agencies, security services and military units use their cloud services. According to the deal’s terms, the companies cannot suspend or withdraw Israel’s access to its technology, even if it’s found to have violated their terms of service.