Method to enforce by a management center the access rules for a broadcast product

摘要: The purpose of this invention is to propose a manner rely lesser extent on the security means receivers module enforce access conditions defined in key messages one hand and handle complex based characteristic properties receiving device or user such other hand. It therefore proposed method by management center rules for broadcast product received receivers, said being released an key, managing plurality Boolean positive negative attributes comprising steps associating attribute receiver entitled loading state it; not defining at least second encryption scheme targeting set each corresponding decryption material; expressing as expression combining conjunction disjunction; generating cryptogram be broadcasted encrypting two combined schemes according expression.