Google and Apple May Help Us Understand ‘Typhoid Mary’s’ Cell Phone Movements

"“The benefit of the Google/Apple approach is that its decentralized,” said Al Gidari, consulting director of privacy at the Stanford Center for Internet and Society, adding that proximity tracing is “as close to anonymous as you can get, technically.”

“The beauty” of the Google and Apple approach is that it works at a scale “that works for 3 billion people,” Gidari said."