JP2020173482A5 - - Google Patents

Download PDF

Info

Publication number
JP2020173482A5
JP2020173482A5 JP2020123590A JP2020123590A JP2020173482A5 JP 2020173482 A5 JP2020173482 A5 JP 2020173482A5 JP 2020123590 A JP2020123590 A JP 2020123590A JP 2020123590 A JP2020123590 A JP 2020123590A JP 2020173482 A5 JP2020173482 A5 JP 2020173482A5
Authority
JP
Japan
Prior art keywords
dealer
key
user
secret information
encrypts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2020123590A
Other languages
English (en)
Other versions
JP2020173482A (ja
Filing date
Publication date
Application filed filed Critical
Priority to JP2020123590A priority Critical patent/JP2020173482A/ja
Priority claimed from JP2020123590A external-priority patent/JP2020173482A/ja
Publication of JP2020173482A publication Critical patent/JP2020173482A/ja
Publication of JP2020173482A5 publication Critical patent/JP2020173482A5/ja
Pending legal-status Critical Current

Links

Claims (1)

  1. 秘密情報をn個に分散し、そのうちk個の分散値を集めれば秘密情報を復元でき、k−1個以下では秘密情報を復元できないシステムであって、
    前記システムは、ユーザのIDと、秘密情報の分散値を保存するc(=n−(b−1)、b≦k、c<k)個のサーバのIDとを有するディーラと、鍵を有するb−1個の鍵サーバと、を有し、
    前記ディーラは、ユーザのIDを前記b−1個の鍵サーバのうちの一部に送信し、
    前記b−1個の鍵サーバのうちの一部の各々は、前記ディーラから送信された前記ユーザのIDを、自分の持つ前記鍵で暗号化し、且つ、前記暗号化により得られた値を、前記ディーラに送信し、
    前記ディーラは、受信した前記値で、秘密情報を暗号化する、
    システム。
JP2020123590A 2020-07-20 2020-07-20 ディーラ、鍵サーバ、及び復元装置 Pending JP2020173482A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020123590A JP2020173482A (ja) 2020-07-20 2020-07-20 ディーラ、鍵サーバ、及び復元装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2020123590A JP2020173482A (ja) 2020-07-20 2020-07-20 ディーラ、鍵サーバ、及び復元装置

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP2019148375A Division JP6876340B2 (ja) 2019-08-13 2019-08-13 ディーラ、鍵サーバ、及び復元装置

Publications (2)

Publication Number Publication Date
JP2020173482A JP2020173482A (ja) 2020-10-22
JP2020173482A5 true JP2020173482A5 (ja) 2021-07-26

Family

ID=72831313

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2020123590A Pending JP2020173482A (ja) 2020-07-20 2020-07-20 ディーラ、鍵サーバ、及び復元装置

Country Status (1)

Country Link
JP (1) JP2020173482A (ja)

Similar Documents

Publication Publication Date Title
US10419404B2 (en) Enabling comparable data access control for lightweight mobile devices in clouds
Yang et al. Expressive, efficient, and revocable data access control for multi-authority cloud storage
Yuan et al. Efficient public integrity checking for cloud data sharing with multi-user modification
US10805076B2 (en) Information processing apparatus, server apparatus, and computer program product
ES2278047T3 (es) Sistema y procedimiento para procesar un secreto compartido.
JP2013539324A5 (ja)
JP6931247B2 (ja) 暗号文照合システム、方法、およびプログラム
JP2012532486A (ja) 暗号化/復号化キーを生成する方法
Vaanchig et al. Achieving Collaborative Cloud Data Storage by Key-Escrow-Free Multi-Authority CP-ABE Scheme with Dual-Revocation.
WO2018235845A1 (ja) 鍵交換システムおよび鍵交換方法
Wang et al. Achieving lightweight and secure access control in multi-authority cloud
Sudarsono et al. An implementation of secure wireless sensor network for e-healthcare system
JP2020173482A5 (ja)
EP3711255A1 (en) Device, system and method for secure data communication
JP2006227411A (ja) 通信システム、暗号化装置、鍵生成装置、鍵生成方法、復元装置、通信方法、暗号化方法、暗号復元方法
Zhang et al. Group key management protocol for file sharing on cloud storage
Das et al. A framework for multi-party skyline query maintaining privacy and data integrity
WO2019142824A1 (ja) 通信装置、サーバ装置、秘匿通信システム、その方法、及びプログラム
JPWO2021009860A5 (ja)
JP2018084846A5 (ja)
Zhou Fractal: A new paradigm for high-performance proof-of-stake blockchains
Yan et al. An efficient proof of retrievability scheme for fully homomorphic encrypted data
Vijayalakshmi et al. An efficient security based multi owner data sharing for un-trusted groups using broadcast encryption techniques in cloud
Nagarani et al. A Flexible Access Control with User Revocation in Fog-Enabled Cloud Computing
Ramkumar Efficient Key Distribution Schemes for Large Scale Mobile Computing Applications