We study the behaviour of rational agents in exchange protocols which rely on trustees. We allow malicious parties to compromise the trustee by paying a cost and, thereby, present a game analysis that advocates exchange protocols which induce balanced risks on the participants. We also present a risk-balanced protocol for fair confidential secret comparison.
I. Cervesato
Lecture Notes in Computer Science
Computer and Network Security, Asian Computing Science Conference
Specification and Analysis of Embedded Systems

Dashti, M.T, & Wang, Y. (2007). Risk Balance in Exchange Protocols. In I Cervesato (Ed.), Advances in Computer Science - ASIAN 2007 (pp. 70–77). Springer.