A rational approach to cryptographic protocols

✍ Scribed by P. Caballero-Gil; C. Henández-Goya; C. Bruno-Castañeda

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 199 KB
• Volume: 46
• Category: Article
• ISSN: 0895-7177
• DOI: 10.1016/j.mcm.2006.12.013

✦ Synopsis

This work initiates an analysis of several cryptographic protocols from a rational point of view using a game-theoretical approach, which allows us to represent not only the protocols but also possible misbehaviours of parties. Concretely, several concepts of two-person games and of two-party cryptographic protocols are here combined in order to model the latter as the former. One of the main advantages of analysing a cryptographic protocol in the game-theory setting is the possibility of describing improved and stronger cryptographic solutions because possible adversarial behaviours may be taken into account directly. With those tools, protocols can be studied in a malicious model in order to find equilibrium conditions that make possible to protect honest parties against all possible strategies of adversaries.