The experimental effort, which has not been disclosed, is being used to conduct mass surveillance of Palestinians in Gaza, according to military officials and others.

After Oct. 7, Israeli intelligence officers in Unit 8200 turned to that surveillance for information on the Hamas gunmen who breached Israel’s borders. The unit also combed through footage of the attacks from security cameras, as well as videos uploaded by Hamas on social media, one officer said. He said the unit had been told to create a “hit list” of Hamas members who participated in the attack.

Corsight was then brought in to create a facial recognition program in Gaza, three Israeli intelligence officers said.