Humidity is the amount of moisture in the air. It can be expressed as absolute humidity, which is the mass of water in a specified volume or mass of air, or more commonly as relative humidity, which is the absolute humidity divided by that absolute humidity that would make dew form at the same temperature.
... have been proposed in recent years which could prove more difficult to circumvent, including copy-prevention codes embedded in broadcast HDTV signals and the Palladium ...