Communications Security (COMSEC)

Below is a sneak peek of this content!

Communications security (COMSEC) is the prevention of interception of communications that could give meaningful intelligence to an adversary, while still being able to deliver it to the intended recipient.  The field of COMSEC include: Transmission security (TRANSEC) – measures used to protect, or reduce, transmissions from interceptionEmissions security (EMSEC) – methods used to deny an adversary information from intercepting electronic emissions coming from systemsPhysical security of COMSEC material (cyphers, codes, etc.)Cryptographic security – the use of technically sound and correct use cryptology systems Transmission Security (TRANSEC) Transmission security measures include: Low probability of intercept (LPI) techniquesLow probability of detection (LPD) techniquesResistance to jamming (electronic counter counter-measures (ECCM)) Techniques for LPI and LPD include: using low power, only what is needed to reach the intended recipientusing directional antennas to direct most of the signal towards the intended recipient and reduce the signals radiatingkeeping transmissions as short as possiblechanging frequencies regularly on a pseudo-random schedule known only to those who need to knowfrequency-hopping spread spectrum (as used in the Single Channel Ground and Airborne Radio System (SINCGARS) military radios (frequency hopping also makes it difficult for an adversary to jam your signal) Physical Security Physical security involves protecting documents and equipment.  This...