@article{oai:doshisha.repo.nii.ac.jp:00027358,
 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 = {最近，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．この分野においてグループ秘密鍵共有の研究が少ないが，RSS系列の差分を通知する方式がある．しかし，従来の方式は，秘密鍵容量の理論式の導出に問題がある．本論文では，相互情報量で表される秘密鍵容量の上限と下限の正確な理論式を求めた．また，相互情報量に対する理論解析法により，SN比の関数となる秘密鍵容量の新しい理論式を導出した．その結果，高SN比において秘密鍵容量の上限と下限がよく一致することが分かった．また，漏洩情報量が端末数の増加に伴い増加することが分かった．さらに，シミュレーションの結果，理論式の妥当性が確かめられた．, Secret key agreement based on radio propagation characteristics attracts attention as a kind of the wireless physical layer security recently.  There are few studies of group secret key agreement in this field, but there is a method to notify of the difference between the series of RSS.  However, the conventional method has a problem in derivation of theoretical expression of the secret key capacity.  This paper deals with a close numerical formula of upper and lower limit of the secret key capacity to be given in mutual information.  This paper derives new theoretical expression of the secret key capacity that is a function of the SN ratio by new theoretical analysis for the mutual information.  As a result, numerical computation shows that the upper limit of the secret key capacity accords with the lower limit in high SN ratio.  Numerical computation also shows that leakage information increases with increase of the number of the terminals.  Furthermore, the result of the computer simulation shows validity of theoretical expression., application/pdf},
 pages = {69--78},
 title = {移動伝搬特性に基づくグループ鍵共有の秘密鍵容量 : (その1)星型接続の場合},
 volume = {61},
 year = {2020},
 yomi = {ササオカ, ヒデイチ and イワイ, ヒサト}
}