In a statement, the Shin Bet security service said the suspect corresponded with the unnamed person over social media. It said he provided photographs taken in the house as proof he had access and proposing installing malware on Gantz's computer.
Tensions run high between Iran and Israel over Tehran's nuclear programme and what Israeli officials describe as its military entrenchment and support of Israel's enemies in the region.
The Shin Bet said the suspect, who
performed housekeeping and cleaning tasks in Gantz's residence, was
indicted on espionage charges by a court in Lod, a city near Tel Aviv.
It said he was arrested after an investigation earlier this month. more