COMMUNICATION SYSTEM FOR MANAGING SAFELY AND INDEPENDENTLY A PLURALITY OF APPLICATIONS BY EACH USER CARD AND CORRESPONDING USER CARD AND MANAGEMENT METHOD

摘要

The invention features a communication system comprising multiple terminal equipment (1), each consisting of a terminal (4) co-operating with a microprocessor-driven user card (SIM module; 5). Each user card includes data memorising means (8) comprising a plurality of objects and serving as medium to at least two separate applications, the user card comprising means (6, 7) for executing instructions pertaining to the applications. Each object contained in the user card data memorising means is associated with a first defined access control policy by a set of first access conditions. Each object is also associated with at least another access control policy defined by a set of at least one alternative access condition. Each alternative access condition is applicable, for the said object, to a group of at least one instruction pertaining to the application(s) using the said other defined access control policy. Each object is also associated with a plurality of access control policy indicators each indicating, for one of the applications, which access control policy to use with the application, the control access policy indicators being stored in the data memorising means (8).