Title:
署名検証システム、署名装置、署名検証方法、およびプログラム
Document Type and Number:
Japanese Patent JP7405253
Kind Code:
B2
Abstract:
A signature verification system includes: a signature apparatus configured to sign a first chameleon hash value, an unmodifiable part of the data, and a second chameleon hash value of an entirety of the data; a changing apparatus configured to change a public key for the changers of the temporary delegator to a public key for changers of an actual delegator, using a private key for the changers; a delegator changing apparatus configured to change a modifiable part of the data, using a private key for the changers of the actual delegator; and a verifying apparatus configured to verify the signature using the public key for the changers and the public key for the changers of the actual delegator.
Inventors:
Hiroto Tamiya
Enketaiwan, Batniyama
Toshiyuki Isshiki
Enketaiwan, Batniyama
Toshiyuki Isshiki
Application Number:
JP2022529192A
Publication Date:
December 26, 2023
Filing Date:
June 02, 2020
Export Citation:
Assignee:
NEC
International Classes:
H04L9/32; G09C1/00
Domestic Patent References:
| JP2010050760A |
Foreign References:
| WO2009028513A1 | ||||
| US20090138718 | ||||
| WO2019057810A1 |
Attorney, Agent or Firm:
Kuniyuki Kajita
Previous Patent: Drive control device and ultrasonic motor system
Next Patent: Corrosion estimation device and method
Next Patent: Corrosion estimation device and method