Perfectly secure message transmission against rational timid adversaries

Maiki Fujita, Kenji Yasunaga, Takeshi Koshiba*


研究成果: Conference contribution

1 被引用数 (Scopus)


Secure Message Transmission (SMT) is a two-party cryptographic protocol by which the sender can securely and reliably transmit messages to the receiver using multiple channels. It is assumed that an adversary corrupts a subset of the channels, and makes eavesdropping and tampering over the corrupted channels. In this work, we consider a game-theoretic security model for SMT. Specifically, we introduce a rational adversary who has the preference for the outcome of the protocol execution. We show that, under some reasonable assumption on the adversary’s preference, even if the adversary corrupts all but one of the channels, it is possible to construct SMT protocols with perfect security against rational adversaries. More specifically, we consider “timid” adversaries who prefer to violate the security requirement of SMT, but do not prefer the tampering actions to be detected. In the traditional cryptographic setting, perfect SMT can be constructed only when the adversary corrupt a minority of the channels. Our results demonstrate a way of circumventing the impossibility results of cryptographic protocols based on a game-theoretic approach.

ホスト出版物のタイトルDecision and Game Theory for Security - 9th International Conference, GameSec 2018, Proceedings
編集者Linda Bushnell, Radha Poovendran, Tamer Basar
出版社Springer Verlag
出版ステータスPublished - 2018
イベント9th International Conference on Decision and Game Theory for Security, GameSec 2018 - Seattle, United States
継続期間: 2018 10月 292018 10月 31


名前Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
11199 LNCS


Other9th International Conference on Decision and Game Theory for Security, GameSec 2018
国/地域United States

ASJC Scopus subject areas

  • 理論的コンピュータサイエンス
  • コンピュータ サイエンス(全般)


「Perfectly secure message transmission against rational timid adversaries」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。