A Cyberattack ‘the World Isn’t Ready For’

There have been times over the last two months when Golan Ben-Oni has felt like a voice in the wilderness.

On April 29, someone hit his employer, IDT Corporation, with two cyberweapons that had been stolen from the National Security Agency. Mr. Ben-Oni, the global chief information officer at IDT, was able to fend them off, but the attack left him distraught.