| 摘要 |
<p>A device, in particular a card reader (30) connectable as a terminal of communications network such as the Internet for carrying out secure transactions, in particular using a protocol such as SET, comprises a keypad (34), a display (36) for displaying messages related to a secure transaction in progress, a DSP microprocessor (38) and a memory (40) comprising an E2PROM and a RAM. The E2PROM is arranged to store software in three shells, a boot shell (62), a system shell (64) and an application shell (66). The boot shell contains non-downloadable ground software that manages software download into the system shell and the application shell. The device is associated with downloadable system shell software and application shell software, one application being arranged to momentaneously store in a network-inaccessible part of the RAM a PAN or PIN code keyed in via the keypad (34); encrypt the code and output the encrypted code to the communications network. The device is useful for secure transactions in e-commerce, e-banking, e-tax, e-mail, telecommunications and restricted access systems, etc.</p> |
