Abstract: In order to provide a protection system (100; 100?) for protecting data (D1+D2), for instance at least one data processing program and/or at least one software application, the protection system (100; 100?) comprising at least one data storage unit (10) for storing the data (D1+D2), at least one main processing unit (20) which is designed for processing at least part (D1) of the data (D1+D2), in particular for processing the first data (D1) and optionally the encrypted second data (D2), the main processing unit (20) being connected with the data storage unit (10), at least one security unit (30), and at least one presentation processing unit (42) being connected with the main processing unit (20), wherein it is possible to prevent the use of illegal copies of the data (D1+D2) and wherein neither an authorization nor a registration is required for running the data (D1+D2), it is proposed that the security unit (30) and the presentation processing unit (42) exchange at least one key, in particular at least one

Abstract: A Modification device (5) is designed to modify an application (A1, A2, A3, A4) run by a data carrier (S), wherein a first key information item (K1) is stored in the data carrier (S) and an associated second key information item (K2) is stored in the modification device.

Abstract: In order to provide a protection system (100; 100?) for protecting data (D1+D2), for instance at least one data processing program and/or at least one software application, the protection system (100; 100?) comprising at least one data storage unit (10) for storing the data (D1+D2), at least one main processing unit (20) which is designed for processing at least part (D1) of the data (D1+D2), in particular for processing the first data (D1) and optionally the encrypted second data (D2), the main processing unit (20) being connected with the data storage unit (10), at least one security unit (30), and at least one presentation processing unit (42) being connected with the main processing unit (20), wherein it is possible to prevent the use of illegal copies of the data (D1+D2) and wherein neither an authorization nor a registration is required for running the data (D1+D2), it is proposed that the security unit (30) and the presentation processing unit (42) exchange at least one key, in particular at least one

Abstract: The present invention relates to a DRM user unit (2) for interacting with DRM client units (3) and DRM server units (1) of a DRM system, said DRM client units (3) storing digital data objects (DDO) and said DRM server units (1) issuing digital rights objects (DRO) representing usage rights of associated digital data objects, said DRM user unit (2) comprising an authentication unit (21) and a rights storage unit (22) for the storage of said digital rights objects. According to the invention the authentication of a DRM client (31) is relocated to the DRM user unit (2) that is possessed by an end user. This has the advantage that now a digital rights objects is a personal license that can be used with more than one playback device/playback system while guaranteeing that no illegal copies in any form can be made of the purchased content.

Abstract: A Modification device (5) is designed to modify an application (A1, A2, A3, A4) run by a data carrier (S), wherein a first key information item (K1) is stored in the data carrier (S) and an associated second key information item (K2) is stored in the modification device.