Method for communicating in a computer network from a first node (101, 102, 103) in the network to a second node (136, 138), not in the network. A virtual identity is manually selected for the first node. The virtual identity is comprised of one or more session identity parameters used for representing the first node during a static communication session with the second node. The session identity parameters used during the static communication session are excluded from a coordinated variation of identity parameters for nodes within the network. In response to determining an occurrence of at least one communication security threat with respect to the static communication session, the method further involves adaptively modifying the virtual identity assigned to the first node by changing at least one of the session identity parameters.