Operation of a security module in a chip-card reader in which transmission of an un-encrypted PIN code from the card reader controller to the card reader and hence the card itself is not required, hence increasing security

摘要

Operating method for a card reader that comprises a controller (12) with an interface (18) to an external card reader controller, and a card interface (40) for reading chip cards, and a security module (20) with an interface (41) joined to the controller (12). Security is provided by generation of two intermediate results according to an order sequence received by the security module via the interface to the external card reader controller. The two intermediate results are transferred to the chip card processor via the card interface and their compared and analyzed. The analysis result is transferred via the external interface and processed by the commanding controller (31)/