So I protected “Massimo Montaldo,” although I knew that wasn’t his name.Massimo shambled through the tall glass doors, dropped his valise with a thump, and sat across the table. We were meeting where we always met: inside the Caffe Elena, a dark and cozy spot that fronts on the biggest plaza in Europe.The Elena has two rooms as narrow and dignified as mahogany coffins, with lofty red ceilings. The little place has seen its share of stricken wanderers. Massimo never confided his personal troubles to me, but they were obvious, as if he’d smuggled monkeys into the café and hidden them under his clothes.Like every other hacker in the world, Massimo Montaldo was bright. Being Italian, he struggled to look suave. Massimo wore stain-proof, wrinkle-proof travel gear: a black merino wool jacket, an American black denim shirt, and black cargo pants. Massimo also sported black athletic trainers, not any brand I could recognize, with eerie bubble-filled soles.These skeletal shoes of his were half-ruined.