CFA Covert Communication Devices 2 — Questions and Answers
Question 1: Which transmission technique reduces interception risk by sending data in a compressed high-speed burst rather than a continuous signal?
- Frequency modulation
- Burst transmission (Correct answer)
- Amplitude shifting
- Carrier wave cycling
Correct answer: Burst transmission
Burst transmission compresses a message and sends it in a very short pulse, minimizing the window during which the signal can be detected or traced.
Question 2: A field agent needs to communicate in a hostile environment where radio signals are monitored. What is the PRIMARY advantage of frequency-hopping spread spectrum (FHSS)?
- Higher transmission power
- Resistance to jamming and interception (Correct answer)
- Longer range than standard radio
- Compatibility with civilian cell networks
Correct answer: Resistance to jamming and interception
FHSS rapidly switches carrier frequencies in a pattern known only to sender and receiver, making interception and jamming extremely difficult.
Question 3: What is a 'dead drop' in the context of covert communications?
- An encrypted satellite uplink
- A physical or virtual location where materials are left for another party without direct contact (Correct answer)
- A coded radio frequency used only once
- A self-destructing message format
Correct answer: A physical or virtual location where materials are left for another party without direct contact
A dead drop allows two parties to exchange information or materials without ever meeting, reducing the risk of both being observed together.
Question 4: Which of the following best describes steganography as used in covert field communications?
- Encrypting a message with a one-time pad
- Hiding a message within an ordinary-looking carrier file such as an image (Correct answer)
- Using a shortwave radio on a designated frequency
- Transmitting data via laser pulse across a window
Correct answer: Hiding a message within an ordinary-looking carrier file such as an image
Steganography conceals the existence of a message by embedding it inside innocent-looking media, unlike encryption which hides only the content.
Question 5: An agent discovers their encrypted communication device has been confiscated by a hostile actor. What security feature is MOST critical to prevent exploitation?
- A long antenna for better signal
- Remote wipe or tamper-triggered data destruction (Correct answer)
- Dual SIM card support
- Bluetooth pairing memory
Correct answer: Remote wipe or tamper-triggered data destruction
Remote wipe or tamper-triggered destruction ensures that captured devices cannot be exploited for intelligence or to compromise the network.
Question 6: What is the primary security purpose of using a one-time pad (OTP) in field communications?
- To extend battery life of the device
- To provide theoretically unbreakable encryption when used correctly (Correct answer)
- To allow multiple agents to share a single encryption key
- To compress messages for burst transmission
Correct answer: To provide theoretically unbreakable encryption when used correctly
A one-time pad, when used with a truly random key of equal length to the message and never reused, provides information-theoretic security that cannot be broken.
Question 7: During a surveillance detection run, an agent notices a contact checking the same park bench twice. In covert communications protocol, this bench most likely functions as what?
- An observation post
- A signal site or dead drop location (Correct answer)
- A counter-surveillance choke point
- A safe house entrance marker
Correct answer: A signal site or dead drop location
Repeated attention to a specific fixed location like a park bench often indicates it serves as a signal site or dead drop in tradecraft.
CFA Covert Communication Devices 2
Which transmission technique reduces interception risk by sending data in a compressed high-speed burst rather than a continuous signal?