@article{oai:doshisha.repo.nii.ac.jp:00029079,
 author = {笹岡, 秀一 and Sasaoka, Hideichi and 岩井, 誠人 and Iwai, Hisato},
 issue = {2},
 journal = {同志社大学ハリス理化学研究報告, The Harris science review of Doshisha University},
 month = {Jul},
 note = {無線物理層セキュリティの一種として電波伝搬特性に基づく秘密鍵共有が注目されている．しかし，複数地点盗聴に対する秘密鍵容量の低下に関する検討が少ない．本論文は、複素チャネル係数に基づく秘密鍵共有において秘密鍵容量の理論式を導出した．また，複数地点盗聴に対する漏洩情報量の理論式を導出し、盗聴地点数の増加とともに漏洩情報量の増加することを示した．また、理論式の妥当性をシミュレーションにより確認した．次に，単調な伝搬環境におけるチャネル係数の空間相関係数の試算を行い，複数地点盗聴に対する漏洩情報量を算出することで，秘密鍵共有の安全性を評価した．, Secret key agreement based on radio propagation characteristics attracts attention as a kind of the wireless physical layer security.  However, there are few studies on drop of the secret key capacity by multiple spot eavesdropping.  This paper derived theoretical formula of the secret key capacity in secret key agreement based on the complex channel coefficient.  This paper also derived theoretical formula of the leakage information by multiple spot eavesdropping and showed that leakage information increased with the increase of the eavesdropping spot number.  Validity of these theoretical formulas was confirmed by computer simulation.  Then, this paper calculated the coefficient of correlation of the channel coefficient in the simple propagation environment and evaluated security of secret key agreement by calculating leakage information for multiple spot eavesdropping., application/pdf},
 pages = {85--95},
 title = {複素チャネル係数に基づく無線秘密鍵共有における複数地点盗聴による秘密鍵容量の低下},
 volume = {63},
 year = {2022},
 yomi = {ササオカ, ヒデイチ and イワイ, ヒサト}
}