Title:
COMMUNICATION DEVICE, COMMUNICATION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2019/058574
Kind Code:
A1
Abstract:
This communication device is designed to be used in a communication system having a key information delivery device and a call control device, and is provided with: a key generation means for, when carrying out media communication with another communication device, requesting common key generation information for generating a first common key from the key information delivery device; a call control means for establishing a call connection between the communication device and the other communication device by transmitting a call connection request message to the call control device; and a communication means for transmitting/receiving a media packet encrypted using a second common key, wherein the key generation means generates the first common key using the common key generation information received from the key information delivery device, and after the first common key is generated, the communication means transmits/receives the media packet encrypted using the first common key.
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Inventors:
OKADA ATSUSHI (JP)
SHIMIZU ATSUO (JP)
SHIMIZU ATSUO (JP)
Application Number:
PCT/JP2018/003289
Publication Date:
March 28, 2019
Filing Date:
January 31, 2018
Export Citation:
Assignee:
NTT COMM CORP (JP)
International Classes:
H04L9/14; H04L9/08
Foreign References:
| JP2002305533A | 2002-10-18 | |||
| JP2010178242A | 2010-08-12 | |||
| US20150026473A1 | 2015-01-22 |
Other References:
TAMURA TOSHIHIKO ET AL.: "A study on secured SIP services in IP mobility environment- IEICE Technical report", IP MOBILITY, vol. 103, no. 313, 11 September 2003 (2003-09-11), pages 67 - 70
YOSHIDA REO ET AL.: "A secure business chat system that prevents leakage and eavesdropping from the server by advanced encryption technology", NTT TECHNICAL REVIEW, vol. 29, no. 2, February 2017 (2017-02-01), pages 18 - 21, XP055583978, Retrieved from the Internet [retrieved on 20180329]
YONEYAMA, K. ET AL.: "Multi-Cast Key Distribution: Scalable, Dynamic and Provably Secure Construction", CRYPTOLOGY EPRINT ARCHIVE, REPORT 2016/833, 29 August 2016 (2016-08-29), XP061021669, Retrieved from the Internet [retrieved on 20180329]
YOSHIDA REO ET AL.: "A secure business chat system that prevents leakage and eavesdropping from the server by advanced encryption technology", NTT TECHNICAL REVIEW, vol. 29, no. 2, February 2017 (2017-02-01), pages 18 - 21, XP055583978, Retrieved from the Internet
YONEYAMA, K. ET AL.: "Multi-Cast Key Distribution: Scalable, Dynamic and Provably Secure Construction", CRYPTOLOGY EPRINT ARCHIVE, REPORT 2016/833, 29 August 2016 (2016-08-29), XP061021669, Retrieved from the Internet
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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