Final answer:
Communications Security (COMSEC) involves protecting communications from unauthorized access, interception, and tampering. The Communications Security Material System (CMS) custodian manages and safeguards the material used in COMSEC, ensuring its proper storage and distribution.
Step-by-step explanation:
Communications Security (COMSEC) is a set of measures taken to protect the confidentiality, integrity, and availability of communications. It involves techniques and technologies that prevent unauthorized access, interception, and tampering of information during transmission. The Communications Security Material System (CMS) custodian is responsible for managing and safeguarding the material used in COMSEC, such as encryption keys and hardware security devices.
The CMS custodian ensures that the material is properly accounted for, stored securely, and distributed only to authorized users. They also oversee the destruction and disposal of sensitive material when it is no longer needed. This role is crucial in maintaining the effectiveness of COMSEC protocols and protecting sensitive information from unauthorized disclosure.