| 摘要 |
A set of data (Tl) that has been encrypted (El) is stored in a data storage medium (DSK), which comprises an access management module (AMM). In a preferred embodiment, various sets of data (Tl, T2, T3, ..) are stored that have been encrypted differently (El, E2, E3, ..), and respective decryption keys are then needed to access respective sets of data. The access management module (AMM) grants or refuses a request (ID) to access any particular set of data by releasing or not releasing, respectively, a decryption key needed to access this particular set of data. |
