Coded messages. Landline phones. Pagers.

Following the killing of senior commanders in targeted Israeli airstrikes, the Iran-backed Lebanese militant group, Hezbollah, has been using some low-tech strategies to try to evade its foe's sophisticated surveillance technology, informed sources said.

It has also been using its own tech — drones — to study and attack Israel's intelligence gathering capabilities in what Hezbollah's leader, Sayyed Hassan Nasrallah, has described as a strategy of "blinding" Israel.