Self Stabilizing Systems : 5th International Workshop WSS 2001 Lisbon Portugal October 1–2 2001 Proceedings This book constitutes the refereed proceedings of the 5th International Workshop on Self Stabilizing Systems WSS 2001 held in Lisbon Portugal in October 2001. The 14 revised full papers presented together with one invited paper were carefully reviewed and selected from 27 submissions. Self stabilizing software offers a unique non traditional approach to the problem of transient fault tolerance. The papers presented explore self stabilization issues for various different manners of systems and software including communication protocols cooperating mobile agents routing in directed networks crash affected systems security and various other distributed systems and applications