Secure Failure Detection in TrustedPals

We present a modular redesign of TrustedPals, a smartcard-based security framework for solving secure multiparty computation (SMC)[?]. TrustedPals allows to reduce SMC to the problem of fault-tolerant consensus between smartcards, where only process crashes and message omissions may take place. Hence, within the redesign aimed at incorporating failure detection, we investigate the problem of solving consensus in such an omission failure model augmented with failure detectors. To this end, we give novel definitions of both consensus and the class of 3P failure detectors [?] in the omission model and show how to implement 3P and have consensus in such a system with some weak synchrony assumptions. The integration of failure detection into the TrustedPals framework uses tools from privacy enhancing techniques such as message padding and dummy traffic. We close by presenting a security performance evaluation.

• Type: Conference
• Year: 2007
• Where: SSS
• Authors: Roberto Cortiñas, Felix C. Freiling, Marjan Ghajar-Azadanlou, Alberto Lafuente, Mikel Larrea, Lucia Draque Penso, Iratxe Soraluze Arriola
• Keywords: Failure Detection, Failure Detectors, Omission Failure Model, SSS 2007