Kardashian knows this. So, when her friends wanted photos, she was concerned. According to TMZ sources, Kim decided to send a few friends pictures. But, the pictures weren't of her child. The photos were fake.
Each friend got a different fake picture. So, when one of the photos ended up in the press, Kardashian would know exactly who sent it. TMZ has two pictures.
Say what you will about Kim Kardashian, but she's no dummy. If somebody's going to make money off of her child, it's going to be her.