Date Added: Oct 2012
As crowd-sourcing is becoming popular for problem solving and completing a task, it is now very important to use this concept in an advance manner. It can also be used as a distributed and vast source of information. This concept is now evolving in world of mobile systems. This will be a little different from that of computer systems. In this paper, the authors have discussed some new technologies and challenges before one to implement these advancements in crowd-sourcing. They are going to talk about cheat-detection techniques, handling multimedia databases and how to trade off between cost and accuracy by considering the redundant data as well.