Ensuring time delays associated with broadcasting data in an interactive system cannot lead to fraudulent competition or voting results

摘要

The present invention provides an interactive system and method of operating such a system for a plurality of users. The system includes a local controller 10 operable to receive user input data and associated timestamps from at least one keypad 18, broadcasting means for broadcasting data to the local controller 10, and a central controller 16 for processing data. The local controller 10 is in communication with the central controller 16 such that it can transmit data to the central controller. The local controller 10 is arranged to store information relating to data e.g. inputs and timestamps received from the keypad or keypads 18, and which is to be transmitted to the central controller 16. The stored information is transmitted to the central controller 16 and compared with data actually transmitted to and/or received by the central controller to try to identify whether fraudulent use of the system has occurred. The system may be an interactive television broadcast which anables audience members to interact with a broadcast and vote or compete in a game. A number of additional security measures may be taken.