Portable data storage device with data security function for e.g. computer, has data authorizing unit for providing data authorizing code to data security unit to determine data for transfer to data generating unit or data storage unit

摘要

The device includes a data security unit (2) electrically connected between a data storage unit (1) and a data generating unit (4). A data authorizing unit (3) continuously provides data authorizing code (30) corresponding to the data authorizing algorithm (20) of the data security unit to determine the kind of data for transfer to the data generating unit or to the data storage unit. The data are sent in packets. The data authorizing unit is electrically connected to the data security unit. The data security unit includes a logic operation module (22) for data computation and evaluation, and a microprocessor module (23) for checking the logic operation module.