Security entails the reduction of the likelihood of damage, whether intentional or inadvertent. Within a context of z/OS, features such as TLS/SSL, IPSec, and SSH can be used to improve the security of data on the network. Other features such as AT-TLS and SAF-based security can also be used. Intrusion detection services are already active to some degree within the TCP/IP stack. The policy agent is the repository for many security-related configuration values. Due to the complexity of the SNA architecture and its present limited use in the telecommunications portion of the network, security in this context is not as much of a concern as it is in an IP context.