What is communications security?

Communications security, often abbreviated as COMSEC, refers to the measures and protocols used to protect sensitive information transmitted through communication channels from unauthorized access, interception, or tampering. This includes securing both digital and analog forms of communication such as phone calls, emails, radio transmissions, and internet data. COMSEC professionals implement encryption, manage secure networks, and ensure compliance with security policies to safeguard organizational or governmental information. Their work is critical in preventing data breaches, espionage, and cyber threats. Effective communications security helps maintain confidentiality, integrity, and availability of information.