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Title:
第1通信装置、第2通信装置、方法、コンピュータプログラム
Document Type and Number:
Japanese Patent JP7321481
Kind Code:
B2
Abstract:
Technology is provided that replaces block chains, is capable of saving accumulated data, and has low cost. A user terminal 100-1 encrypts target data (S804), and sends the data to a user terminal 100-2 (S805). The user terminal 100-2 receives the data (S901), and further encrypts the encrypted target data (S902). The user terminal 100-2 records the double-encrypted target data (S903), and transmits the data to the user terminal 100-1 (S904). The user terminal 100-1 receives the data (S806), and records the double-encrypted target data (S807).

Inventors:
Takatoshi Nakamura
Application Number:
JP2017177056A
Publication Date:
August 07, 2023
Filing Date:
September 14, 2017
Export Citation:
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Assignee:
NTT Corporation
International Classes:
H04L9/14; H04L9/08
Domestic Patent References:
JP10187836A
JP7225550A
JP201496692A
Other References:
AGRAWAL,Rakesh et al.,Information Sharing Across Private Databases,Proceedings of the 2003 ACM SIGMOD International Conference on Management of Data,米国,ACM,2003年6月,pp.86-97
東角 芳樹 ほか,コンソーシアムチェーンにおける証明書管理に関する一考察,2017年 暗号と情報セキュリティシンポジウム(SCIS2017)予稿集[USB],日本,2017年 暗号と情報セキュリティシンポジウム実行委員会,2017年1月24日,1F2-3,pp.1-4
Attorney, Agent or Firm:
Yoshito Muramatsu