Data processing: financial – business practice – management – or co – Business processing using cryptography – Usage protection of distributed data files
Patent
1997-05-23
2000-04-11
Cangialosi, Salvatore
Data processing: financial, business practice, management, or co
Business processing using cryptography
Usage protection of distributed data files
705 65, 705 67, H04L 900
Patent
active
060497882
ABSTRACT:
Portable data media are known of which many have the uniform format of a standardized credit card and which are used in different ways for monetary transactions, preferably for the cash-less payment of services. Small portable terminals are also known which can be used together with such data media in order to display for example the contents of specific memories in the data medium or also to execute specific operations in the data medium. As a function of the application purpose of the data medium many diverse functions are desired. In order to avoid that for diverse functions, respectively for different data media with the most diverse applications, a special terminal must be used in each instance, it is suggested according to the invention to provide the terminal with further receiving means for a second data medium which comprises a control circuit cooperating with the terminal. The control circuit of the terminal in that case can have a very simple structure; more complex operations are then controlled by the second data medium. In particular, a unique irreversible assignment exists of a first data medium with for example monetary functions and a specific second data medium so that only the two together can be used, however, with any desired terminal. The use of a second data medium has further the advantage that the same terminal can be used for the most diverse applications thereby that in the terminal several second data media can be received and the second data medium provided for the desired application is inserted into the terminal.
REFERENCES:
patent: 4450535 (1984-05-01), de Pommery et al.
patent: 4742351 (1988-05-01), Suzuki
patent: 4802218 (1989-01-01), Wright et al.
patent: 4864618 (1989-09-01), Wright et al.
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