イベント履歴蓄積装置、イベント情報検証装置、イベント履歴蓄積方法、イベント情報検証方法およびイベント情報処理システム - Nippon Telegraph and Telephone Corporation

Title:

イベント履歴蓄積装置、イベント情報検証装置、イベント履歴蓄積方法、イベント情報検証方法およびイベント情報処理システム

Document Type and Number:

Japanese Patent JP4235193

Kind Code:

B2

Abstract:

To provide a technology for accurately verifying the occurrence sequence of event information to be verified without use of ambiguous time information and accurately verifying whether or not the event information to be verified has been tampered.

For each generated event information, a hash value is prepared, a hash node is generated for which the prepared hash value and the event information are recorded, and the hash nodes are concatenated in the generation order to generate a hash node chain. For verifying the event information, the hash value and the event information recorded in the hash node are used to evaluate the validity of the hash node chain, and whether or not the event information to be verified match the event information recorded in the hash node associated with it is verified. Thereby, whether or not the occurrence sequence of the event information to be verified and these pieces of event information have been tampered can be verified.

Inventors:

Shinichi Nakahara
Ryohiko Nakajima

Application Number:

JP2005166324A

Publication Date:

March 11, 2009

Filing Date:

June 07, 2005

Export Citation:

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Assignee:

Nippon Telegraph and Telephone Corporation

International Classes:

G06F21/60; G06F21/64; H04L9/32

Domestic Patent References:

JP2002215029A
JP2005001815A
JP2007500885A
JP10508121A
JP2002335241A
JP10283263A

Foreign References:

WO2005010685A1

Attorney, Agent or Firm:

Yoshiyoshi Ogasawara
Hikaru Okada

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