Diversity and resistance in a model network with adaptive software

Security Informatics

Table 2 Constants

Constant name	Value	Unit
Attack interval	50000	time steps
Software edge traversal time	100	time steps
Software request edge traversal time	100	time steps
Software incorporation time	1	time step
Repair attempt time	100	time steps
Random variants tested per repair attempt	10	software variants
Software request interval	300	time steps
Node count	1024	nodes

The model simulates parallelism by associating an update time with all objects and incrementing update times by a specified amount when different actions are performed. Table2 shows the time step penalties and other constants used in the simulation. Any actions not listed, such as a node checking its own vulnerability, incurs no delay. Attack interval is the number of time steps before the next attack occurs. There was never a case of a node being vulnerable to the previous attack when the next attack occurred.