A method includes identifying a suspect node of a network that includes multiple nodes in wireless communication. The method also includes initiating formation of a sub-network of the network in response to identifying the suspect node. The suspect node is not a member of the sub-network. After formation of the sub-network, first communications between the suspect node and a device of the network are routed to or through at least one of the members of the sub-network. The sub-network is configured to enable second communications between members of the sub-network, where the second communications are communicated in a manner that is secured against access by the suspect node.