System & Communications Protection

Monitor, control, and protect communications (i.e., information transmitted or received by organizational systems) at the external boundaries and key internal boundaries of organizational systems

Employ architectural designs, software development techniques, and systems engineering principles that promote effective information security within organizational systems

Separate user functionality from system management functionality

Prevent unauthorized and unintended information transfer via shared system resources

Implement subnetworks for publicly accessible system components that are physically or logically separated from internal networks

Deny network communications traffic by default and allow network communications traffic by exception (i.e., deny all, permit by exception)

Prevent remote devices from simultaneously establishing non-remote connections with organizational systems and communicating via some other connection to resources in external networks (i.e., split tunneling)

Implement cryptographic mechanisms to prevent unauthorized disclosure of CUI during transmission unless otherwise protected by alternative physical safeguards

Terminate network connections associated with communications sessions at the end of the sessions or after a defined period of inactivity

Establish and manage cryptographic keys for cryptography employed in organizational systems

Employ FIPS-validated cryptography when used to protect the confidentiality of CUI

Prohibit remote activation of collaborative computing devices and provide indication of devices in use to users present at the device

Control and monitor the use of mobile code

Control and monitor the use of Voice over Internet Protocol (VoIP) technologies

Protect the authenticity of communications sessions

Protect the confidentiality of CUI at rest