Smart card message transfer without microprocessor intervention

Details Smart card message transfer without microprocessor intervention Smart card message transfer without microprocessor intervention

1997-05-05

1998-07-28

Baker, Stephen M.

Excavating

235380, G06F 300

Patent

active

057871019

ABSTRACT:
A signal processing system includes a system control processor, an integrated circuit (IC) card, or smart card, for access control processing, system memory, and a smart card interface circuit including a direct memory access interface circuit for providing high speed access to the system memory. Data transfers between the smart card and system memory occur via the smart card interface circuit and the direct memory access interface circuit. The system controller initializes the smart card interface circuit prior to a transfer and, after a transfer is complete, processes transferred data that is stored in system memory. Processing by the system controller is not required during the transfer to complete the transfer. The smart card interface circuit also filters the transferred data stream by checking and generating parity bits as required and removing smart-card related control data from the data that is stored in memory.

REFERENCES:
patent: 4509210 (1985-04-01), Kohn
patent: 4882474 (1989-11-01), Anderl et al.
patent: 5111504 (1992-05-01), Esserman et al.
patent: 5144664 (1992-09-01), Esserman et al.
patent: 5149945 (1992-09-01), Johnson et al.
patent: 5204663 (1993-04-01), Lee
patent: 5227614 (1993-07-01), Danielson et al.
patent: 5237610 (1993-08-01), Gammie et al.
patent: 5319751 (1994-06-01), Garney
patent: 5379344 (1995-01-01), Larsson et al.
patent: 5442704 (1995-08-01), Holtey
patent: 5448045 (1995-09-01), Clark
patent: 5481609 (1996-01-01), Cohen et al.
patent: 5491827 (1996-02-01), Holtey
Jones, S., et al., "Authentication in a UNIX Network Environment Using Smart Cards", UK IT (IEE Conf. Pub. 316), pp. 32-37, Jan. 1990.
U.S. patent application No. 08/232,794, Tamer et al., filed Apr. 22, 1984.
International Standard, ISO 7816-1 "Identification Cards-Integrated Circuits(s) Cards with Contacts" Part 1: Physical characteristics.
International Standard, ISO 7816-2 "Identification Cards-Integrated Circuit(s) Cards with Contacts" Part 2: Dimensions and location of the contacts.
International Standard, ISO 7816-3 "Indentification Cards-Integrated Circuit(s) Cards with Contacts" Part 3: Electronic signals and transmission protocols.

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