Well if one modifies the channel state information in an unpredictable manner while performing sensitive operations, it becomes very difficult to extract any in

Well if one modifies the channel state information in an unpredictable manner while performing sensitive operations, it becomes very difficult to extract any information. The simplest way to do this might be to fidget. Use one hand to type and another hand to fidget with something. A more high tech method would be to use a modulated wifi reflector that is randomly modulated. One should also watch out for wifi hotspots with ominously pointed directional antenna