MOBILE NETWORK AUTHENTICATION FOR PROTECTING STORED CONTENT

摘要

The present invention relates to a method of protecting content stored on a storage medium ( 7 ) against unauthorized access, said storage medium ( 7 ) being accessible by a drive (D) of a portable device ( 2 ) which is connectable to a network ( 1 ). In order to provide a high level of protection against unauthorized access it is proposed to use the authentication procedure of the network ( 1 ) to generate a cryptographic key (ck) for encryption and decryption of content stored on said storage medium ( 7 ). In particular, the present invention is used in a mobile phone network where the authentication key (ak) is stored on a SIM card ( 8 ) used in a mobile phone ( 2 ).