Transport data raise privacy concerns

Yikatong allow public to track where passengers have been, gone

BEIJING - Modern technology may be allowing someone who has not even followed you to know exactly where you have been.

When you use yikatong, the blue cards passengers often swipe when boarding a public bus or subway train, a person can learn exactly when you rode public transport and where you went simply by typing onto a website the 17 numbers appearing on the card.