Information-theoretically secure secret key sharing suitable for open flow networks

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K11983
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Theory of informatics
• Research Institution: Nara Institute of Science and Technology (2017); Tohoku Gakuin University (2015-2016)
• Principal Investigator: Hayashi Yuichi 奈良先端科学技術大学院大学, 情報科学研究科, 教授 (60551918)
• Co-Investigator(Kenkyū-buntansha): 水木 敬明 東北大学, サイバーサイエンスセンター, 准教授 (90323089) ; 曽根 秀昭 東北大学, サイバーサイエンスセンター, 教授 (40134019)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 秘密鍵共有 / 秘匿通信路 / セキュア通信 / SDN

Outline of Final Research Achievements

In this research, we developed the following key technologies. As a result, in the public network where the communication paths can be changed dynamically, we achieved information theoretically secure secret key generation. Then, using the obtained secret keys, secure information communication paths can be established on a public network. Key Technology 1: We developed a technique to establish a virtual secret communication path using OpenFlow switch and Open vSwitch. Key Technology 2: We applied the ST flow protocol to the secret key sharing graph and developed a method to minimize the probability of leakage of secret keys to eavesdropper. Key Technology 3: Developed a multiparty method to share a common secret key on a public network based on Key Technology 2.

Free Research Field

情報学基礎理論