Title:
MUTUAL AUTHENTICATION METHOD AND COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/044624
Kind Code:
A1
Abstract:
Provided are a mutual authentication method and a communication system capable of performing authentication within a short time. This mutual authentication method is used for a communication system including a first communication device and a second communication device having a shared key, where the first communication device and the second communication device each hold a first count value and a second count value representing the number of communications. The first communication device generates a first encrypted value by encrypting the first count value with the shared key, and transmits the first encrypted value and a first numerical value including at least a portion of the first count value to the second communication device. When the second communication device receives the first encrypted value and the first numerical value, the second communication device decrypts the first encrypted value with the shared key, determines whether there is a match between a first decrypted value obtained through the decryption and the first numerical value, and, when there is a match, determines that the first communication device is authenticated if the first decrypted value is equal to the second count value or is more advanced than the second count value.
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Inventors:
MURATA SHINJI (JP)
MASUDAYA HIDEKI (JP)
MASUDAYA HIDEKI (JP)
Application Number:
PCT/JP2019/009533
Publication Date:
March 05, 2020
Filing Date:
March 08, 2019
Export Citation:
Assignee:
ALPS ALPINE CO LTD (JP)
International Classes:
H04L9/32; G06F21/44
Domestic Patent References:
| WO2014147934A1 | 2014-09-25 |
Foreign References:
| US20090019282A1 | 2009-01-15 | |||
| JP2011523264A | 2011-08-04 | |||
| JPH10304333A | 1998-11-13 | |||
| US20090153290A1 | 2009-06-18 | |||
| JP2014168216A | 2014-09-11 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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