DATA PROCESSOR AND HISTORY VERIFYING METHOD - NIPPON TELEGRAPH & TELEPHONE

Title:

DATA PROCESSOR AND HISTORY VERIFYING METHOD

Document Type and Number:

Japanese Patent JP2005149011

Kind Code:

A

Abstract:

To provide a data processor and a history verifying method for detecting the alteration of a processing history.

When the capacity of a history list Li in a tamper-proof device is short, history information is saved to an external list Lo in an external storage device, and saving records S for guaranteeing the contents and order of the history information to be saved are generated and stored by using uni-directional functions in the tamper-proof device. At the time of verifying the external list Lo, the history information in the external list Lo is read in the order of saving, and a check value C is generated by using the uni-directional functions identical to those at the time of generating the saving records, and collated with the saving records S.

Inventors:

NAGAO SHINJI
KAKAN KURAYUKI
MIYAZAWA TOSHIYUKI

Application Number:

JP2003384032A

Publication Date:

June 09, 2005

Filing Date:

November 13, 2003

Export Citation:

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Assignee:

NIPPON TELEGRAPH & TELEPHONE

International Classes:

G06F12/14; G06F21/64; (IPC1-7): G06F12/14

Domestic Patent References:

JP2003263299A	2003-09-19
JP2001337600A	2001-12-07
JP2002215029A	2002-07-31
JPH10123950A	1998-05-15

Attorney, Agent or Firm:

Kosaku Sugimura

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