Title:
FIRST COMMUNICATION APPARATUS, SECOND COMMUNICATION APPARATUS, SYSTEM, METHOD AND PROGRAM
Document Type and Number:
Japanese Patent JP2022012202
Kind Code:
A
Abstract:
To provide a first communication apparatus, a second communication apparatus, a system, a method and a program that can surely encrypt user data using an encryption key even when there is time difference between update timing of an encryption key of a first communication apparatus and update timing of an encryption key of a second communication apparatus.SOLUTION: A first communication apparatus 11 according to the present disclosure comprises: an encryption unit 111 that creates encrypted user data which is encrypted by an old encryption key K21 from user data and encryption confirming packet which is encrypted by a new encryption key K22 from a confirming packet; a transmission unit 112 that transmits the encrypted user data and the encryption confirming packet to a second communication apparatus 12; and a reception unit 113 that receives a response packet being a response of the encryption confirming packet from the second communication apparatus 12. The encryption unit 111 encrypts next user data using the old encryption key K21 or the new encryption key K22 on the basis of existence/non-existence of the response packet.SELECTED DRAWING: Figure 1
Inventors:
ONOGI YOSHIYUKI
Application Number:
JP2020113859A
Publication Date:
January 17, 2022
Filing Date:
July 01, 2020
Export Citation:
Assignee:
NEC PLATFORMS LTD
International Classes:
H04L9/16; H04L9/08
Domestic Patent References:
| JP2009207049A | 2009-09-10 | |||
| JP2007104310A | 2007-04-19 |
Foreign References:
| WO2011114460A1 | 2011-09-22 | |||
| WO2009001444A1 | 2008-12-31 | |||
| US20150156014A1 | 2015-06-04 |
Attorney, Agent or Firm:
Ken Ieiri