Title:
INFORMATION INPUT/OUTPUT SYSTEM
Document Type and Number:
WIPO Patent Application WO2005003886
Kind Code:
A3
Abstract:
An input/output (IO) system reduces the processing load involved in judging whether a device is valid or revoked. The system is constituted from an input/output (IO) device and an information usage device. The IO device outputs an identifier (ID) list to the information usage device, the ID list including one or more identifiers (IDs), arranged according to a predetermined rule, that each correspond to a different valid or revoked device. The information usage device uses the received ID list to specify a target range that includes a target ID stored by the information usage device, and outputs range information indicating the specified target range to the IO device, which uses the received range information in judging whether the information usage device is valid or revoked.
Inventors:
NAKANO TOSHIHISA
TATEBAYASHI MAKOTO
YAMAMOTO NAOKI
ISHIHARA HIDESHI
TATEBAYASHI MAKOTO
YAMAMOTO NAOKI
ISHIHARA HIDESHI
Application Number:
PCT/JP2004/010068
Publication Date:
May 06, 2005
Filing Date:
July 08, 2004
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
NAKANO TOSHIHISA
TATEBAYASHI MAKOTO
YAMAMOTO NAOKI
ISHIHARA HIDESHI
NAKANO TOSHIHISA
TATEBAYASHI MAKOTO
YAMAMOTO NAOKI
ISHIHARA HIDESHI
International Classes:
G06F21/00; H04L9/08; H04L9/32; (IPC1-7): G06F1/00; H04L9/32
Foreign References:
| US5903651A | 1999-05-11 |
Other References:
WOHLMACHER P ED - ASSOCIATION FOR COMPUTING MACHINERY: "DIGITAL CERTIFICATES: A SURVEY OF REVOCATION METHODS", 4 November 2000, PROCEEDINGS ACM MULTIMEDIA 2000 WORKSHOPS. MARINA DEL REY, CA, NOV. 4, 2000, ACM INTERNATIONAL MULTIMEDIA CONFERENCE, NEW YORK, NY : ACM, US, PAGE(S) 111-114, ISBN: 1-58113-311-1, XP001003705
KOCHER P C: "ON CERTIFICATE REVOCATION AND VALIDATION", FINANCIAL CRYPTOGRAPHY. INTERNATIONAL CONFERENCE, XX, XX, 1998, pages 172 - 177, XP000997209
KOCHER P C: "ON CERTIFICATE REVOCATION AND VALIDATION", FINANCIAL CRYPTOGRAPHY. INTERNATIONAL CONFERENCE, XX, XX, 1998, pages 172 - 177, XP000997209
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