In this work we are going to study and evaluate several SIMbased and non SIM-based authentication schemes for use in an IMS platform. The work will be done as part of the EUREKA!-funded Mobicome project. In this project eleven partners are participating in order to get a working prototype of the new generation network IMS to run. The major idea of the extended IMS functionality is seamlessness, both regarding network and device switching. Seamlessly working security solutions are a self-evident must in this context. In order to satisfy the customer while meeting technical boundary conditions, solutions must work in a satisfactory manner in many respects. On this background, this paper is a position paper, stating started and planned work on the evaluation of candidate security solutions for seamless IMS-based communications. First, the primary criteria of evaluation, namely security, user-friendliness and simplicity, are discussed. Then, the secondary criteria, which include awareness, usability and algorithms, are described. Along with the criteria, both sub-criteria and corresponding parameters are outlined. After this, the methodology for the evaluation is described. Finally, an outlook is presented at the end of the chapter.

Ett första ansats för klassificering av sömlösa säkerhetslösningar med tanke på säkerhetsnivå, användarvänlighet och enkelhet som förstahands kriterier samt medvetenhet, användbarhet och algoritmer som andrahands kriterier. Dessutom beskrivs evalueringsmetoder. IMS, säkerhet, sömlös autentifiering, evalueringskriteria