New Delhi, March 24 -- The role of Israel's hijacking of Iran's street cameras in the killing of the country's supreme leader underscores how surveillance systems are increasingly being targeted by adversaries in wartime.

Hundreds of millions of cameras have been installed above shops, in homes and on street corners across the world, many connected to the internet and poorly secured. Recent advances in artificial intelligence have enabled militaries and intelligence agencies to sift through vast amounts of surveillance footage and identify targets.

On Feb. 28, Israel vividly demonstrated the potential of such systems to be hacked and used against adversaries when Israel tracked down Iranian leader Ayatollah Ali Khamenei with the help of...