A method for managing the billing a round radio power per unit time

摘要

The aim of the invention is the description of a method for accounting by units of time for the use of broadcast services on a decoder in a system using a content encrypted by control words, the latter modified in a period called a crypto-period. The method comprises verifying whether the current time (TC) is included within a time variable (Rdate) which represents the duration of authorisation to use said service and, where this is the case, to decrypt and return the control words to the controller. Where the above is not the case the method comprises debiting an amount (CT) corresponding to a usage period (AT) and replacing the time variable (Rdate) with a corresponding duration.