This technology would make telling secrets very easy. One could easily tell someone something across the world without anyone else knowing. Some repercussions of this would include political spying becoming much harder to do, but easier to keep secret. Socially embarrassing things would also become easier to plan. And surprises would also be easier to organize without being overheard. Though occasionally people would probably "slip" and accidentally transfer knowledge. Direct knowledge transmission would make communication errors almost non-existent, as people don't transfer easily misunderstood information.
That being said, likely technology would be developed to "overhear" brain transmissions, or even thoughts (by hacking the technology used to transmit those thoughts). Technology to store "knowledge" from brains, that was always accessible would likely be developed (similar to our internet). Possibly even there would be the ability to secure these networks.
Overall, I think the amount of data available to the general public would not change a whole lot, because extra steps would be taken to protect sensitive data, and not everyone could just read someone else's thoughts from anywhere in the world. And like anything else, it depends on the exact capabilities of the technology.