Dynamics of Self-Repair Networks of Several Types

We discuss the problem of spreading of the normal state (rather than spreading of the abnormal state), which is formalized as cleaning a contaminated network by mutual copying and self-copying. Repairing by copying is a double-edged sword problem that could spread contamination unless properly used. This chapter further focuses on transient states of self-repair networks involving several types of repair. Some implications for the framework of antivirus systems (against computer viruses and worms) will be presented comparing mutual repair and self-repair of nodes in the network.