@article{oai:doshisha.repo.nii.ac.jp:00022451,
 author = {笹岡, 秀一 and Sasaoka, Hideichi},
 issue = {3},
 journal = {同志社大学理工学研究報告, The Science and Engineering Review of Doshisha University},
 month = {Oct},
 note = {最近、秘密鍵共有や秘密情報伝送などの電波を用いた物理層における情報セキュリティ技術が注目されている。共通情報を用いた秘密鍵共有については、秘密鍵容量の一般式が求められているが、無線通信路で得られるガウス性相関情報を用いた秘密鍵共有の秘密鍵容量に厳密な評価が行われていない。本論文では衛星通信路モデルに対して秘密鍵容量の理論解析を行った。理論解析の結果、秘密容量の上限が条件付き相互情報量で表されることを明らかにした。また、秘密鍵容量の上限と下限の式が、信号対雑音電力比、盗聴者対正規者雑音電力比の関数で表されることを明らかにした。さらに、盗聴者対正規者雑音電力比が大きい場合に、秘密鍵容量が条件付き相互情報にした。, Information security schemes based on radio propagation property such as secret key agreement and secret data transmission have attracted attention in the current wireless community. For the secret key agreement from common information, a general formula of the secret key capacity is given, but a specific formula of secret key capacity has not present for secret key agreement from Gaussian correlated information, which is typical case in wireless channels. This paper deals with the theoretical analysis on secret key capacity for the satellite communication channel model. The analysis result shows that the upper band of secret key capacity is given with conditional mutual information and that the formula of upper and lower band is expressed as functions of the signal-to-noise power ratio and the noise power ratio of eavesdropper to legitimate user. The analysis result also shows that secret key capacity can approximately be given by conditional mutual information in the case that noise power ratio of eavesdropper to legitimate user is large., application/pdf},
 pages = {185--192},
 title = {無線通信におけるガウス性相関情報に基づく秘密鍵共有の秘密鍵容量 : (その1)衛星通信路モデル},
 volume = {54},
 year = {2013},
 yomi = {ササオカ, ヒデイチ}
}