Title:
MOBILE COMMUNICATION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2024/063047
Kind Code:
A1
Abstract:
The present invention safely retains secret information, such as secret keys, which is used for utilization of crypto-assets and which should be kept secret. A smartphone 10 is a mobile communication terminal that is used for utilization of crypto-assets and that is capable of comprising a SIM 20 which is for use in mobile communication and which is a subscriber authentication module for storing therein subscriber information, the smartphone comprising: an acquisition unit 12 that acquires a plurality of divided information items resulting from division of secret information which is used for utilization of crypto-assets and which should be kept secret; a storage unit 13 that stores, in the SIM 20, a portion of the acquired divided information items, and stores, in a storage region 11 of the terminal other than the SIM 20, another portion of the divided information items; and a utilization unit 14 that generates secret information from the plurality of divided information items stored in various storage regions and uses the secret information for utilization of the crypto-assets.
Inventors:
AKANUMA JUN (JP)
MAEJIMA HARUNOBU (JP)
FUKUDA MASAHIRO (JP)
USUI SHIGENORI (JP)
MAEJIMA HARUNOBU (JP)
FUKUDA MASAHIRO (JP)
USUI SHIGENORI (JP)
Application Number:
PCT/JP2023/033881
Publication Date:
March 28, 2024
Filing Date:
September 19, 2023
Export Citation:
Assignee:
NTT DOCOMO INC (JP)
International Classes:
H04L9/08; H04M1/00
Foreign References:
| JP2005208841A | 2005-08-04 | |||
| JP2020155911A | 2020-09-24 | |||
| JP2010011109A | 2010-01-14 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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