Title:
A decoding result verification device, a method, a system, and a program
Document Type and Number:
Japanese Patent JP5912281
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a technique for verifying whether a decryption device has correctly performed calculations for decryption.SOLUTION: Hereafter, h is defined as a hash function, E(m, r) is defined as an encryption function for encrypting, with an integer r, a message m to generate a cypher text so as not to allow the leakage of information on the message m from the generated cypher text, and E(m, h(m)) is defined as a cypher text c. A device for verifying a decryption result comprises: a transmitter 11 for transmitting the cypher text c to a decryption device 2 which can decrypt the received cypher text c with a decryption function D corresponding to the encryption function E, and outputs a decryption result m' thereof; a receiver 12 for receiving the decryption result m' from the decryption device; a verification information generator 13 for calculating verification information E(m', h(m')) by using the decryption result m'; and a determiner 14 for determining whether the verification information E(m', h(m')) matches with the cypher text c.
Inventors:
Tsuyoshi Yamamoto
Tetsutaro Kobayashi
Tetsutaro Kobayashi
Application Number:
JP2011092163A
Publication Date:
April 27, 2016
Filing Date:
April 18, 2011
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H04L9/32
Domestic Patent References:
| JP2000148011A | ||||
| JP2004254027A | ||||
| JP2012212031A |
Attorney, Agent or Firm:
Yoshimoto Toyoda
Hiroshi Watanabe
Hiroshi Watanabe