A P2P Job Assignment Protocol for Volunteer Computing Systems Daniela Barbalace barbalace@si.deis.unical.it Universit` a della Calabria, Rende (CS), Italy Pasquale Cozza pcozza@deis.unical.it Universit` a della Calabria, Rende (CS), Italy Carlo Mastroianni mastroianni@icar.cnr.it ICAR-CNR, Rende (CS), Italy Domenico Talia talia@deis.unical.it Universit` a della Calabria, Rende (CS), Italy CoreGRID Technical Report Number TR-0117 December 13, 2007 Institute on Knowledge and Data Management Institute on Architectural Issues: Scalability, Dependability, Adaptability CoreGRID - Network of Excellence URL: http://www.coregrid.net CoreGRID is a Network of Excellence funded by the European Commission under the Sixth Framework Programme Project no. FP6-004265