IMPROVED DISC UNIT

摘要

The invention relates to an improved disc unit provided with a module (1) comprising integrated circuits and connectors (5), and devices connecting said module to a disc reader and to a computer. A connection head (2) provided with connectors (4), a bus (3) and an input/output controller E/S are used. Files charged in a read only or read programmable memory of the module, keys, devices for testing the keys, coding frames, devices for forbidding or authorizing reading allow to achieve a good protection against pirating of commercial softwares as well as a perfect confidentiality.