@article{oai:ipsj.ixsq.nii.ac.jp:00222833,
 author = {岩村, 惠市 and 稲村, 勝樹 and Keiichi, Iwamura and Masaki, Inamura},
 issue = {12},
 journal = {情報処理学会論文誌},
 month = {Dec},
 note = {Internet of Things（IoT）ネットワークでは，2つの端末が1対1で行うユニキャスト通信，3つ以上の端末が同時に参加するグループ通信，ネットワーク内すべての端末が参加するブロードキャスト通信の3種類の通信形態が想定される．IoTネットワークにおいて暗号通信を行う場合，ユニキャスト通信では端末どうしが共有するペア鍵，グループ通信ではグループを構成する端末のみが持つグループ鍵，ブロードキャスト通信では全端末が共有するグローバル鍵の共有がそれぞれ必要である．今まで鍵共有方式の研究では個別の通信形態での鍵共有方式が提案されており，全通信形態に対応し，かつ効率の良い鍵共有方式はなかった．本論文では，グループ鍵共有を実現する幾何学的鍵共有方式を改良し，すべての通信に適用できる鍵共有方式を提案する．また，従来の鍵共有方式と比較を行い，提案方式が効率的であることを示す．, In the Internet of things (IoT) network, three types of communication formats are assumed: unicast communication between two terminals on a one-to-one basis, group communication in which three or more terminals participate simultaneously, and broadcast communication in which all terminals in the network participate. For encryption of communication in IoT networks, unicast communication requires the sharing of pair key that is shared between terminals, group communication requires the sharing of group key that is held only by terminals that make up the group, and broadcast communication requires the sharing of global key that is shared by all terminals. Previous research on key-sharing methods has proposed the methods for individual communication types, and there has been no efficient key-sharing method that can be used for all communication types. In this paper, we improve the geometric key sharing scheme for group key sharing and propose a key sharing scheme that can be applied to all types of communication. Furthermore, we compare the proposed scheme with conventional key sharing schemes and show that the proposed scheme is efficient.},
 pages = {1745--1756},
 title = {ペア鍵・グループ鍵・グローバル鍵を効率的に共有する幾何学的鍵共有方式},
 volume = {63},
 year = {2022}
}