Title:
Key storage device, key storage method, and its program
Document Type and Number:
Japanese Patent JP6294882
Kind Code:
B2
Abstract:
An object is to provide a key storage apparatus which prevents a service from being resumed with the same configuration as a configuration during an arithmetic processing provision period, a key storage method, and a program therefor. The key storage apparatus is such that it is assumed that, before expiration of a period for providing arithmetic processing using a key, the key is secretly managed, and that the key is outputted when the period expires, and the key storage apparatus comprises: a one-way function section causing a one-way function to act on first information to generate the key; a storage section secretly storing the first information during the period; and an expiration judging section eliminating the first information from the storage section and outputting the key when the period expires.
Inventors:
Tetsutaro Kobayashi
Tsuyoshi Yamamoto
Rei Yoshida
Tomohide Yamamoto
Tsuyoshi Yamamoto
Rei Yoshida
Tomohide Yamamoto
Application Number:
JP2015527247A
Publication Date:
March 14, 2018
Filing Date:
July 02, 2014
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H04L9/08; G06F21/60
Domestic Patent References:
| JP2011176435A | ||||
| JP2002208216A | ||||
| JP2004354920A | ||||
| JP2006246359A | ||||
| JP2001237817A | ||||
| JP2006318291A | ||||
| JP2006352312A | ||||
| JP2006311453A |
Attorney, Agent or Firm:
Yoshimoto Toyoda
Hiroshi Watanabe
Hiroshi Watanabe
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