One-Time Capabilities for Authorizations without Trust

This paper introduces and solves a security problem of pervasive computing: how to define authorizations for offline interactions when trust relationships among entities do not exist. A new type of capability is proposed to assure that user interactions are not traceable and that misbehaving users automatically lose some money they deposited as a guarantee of their loyalty. The solution inspired by electronic cash is based on a new version of the cut-and-choose protocol adapted for open environments.

• Type: Conference
• Year: 2004
• Where: PERCOM
• Authors: Laurent Bussard, Refik Molva
• Keywords: Offline Interactions, PERCOM 2004, Pervasive Computing, User Interactions, Wireless Networks