Which countermeasure is most effective in preventing eavesdropping on LF RFID communications?

Using a longer antenna on the reader

Increasing the reader's transmit power

Using a Faraday shield or enclosure around the reader area

Storing data in plaintext on the tag

A manufacturing facility uses 125 kHz RFID badges for employee access to the production floor. During a security audit, you discover that an attacker could capture badge data from 3 meters away using a custom antenna and software-defined radio. The badges are read-only and cannot be updated. Which control would most effectively mitigate this specific vulnerability without replacing the entire badge system?

Implement a policy requiring employees to store badges in shielded sleeves when not in use

Install a Faraday cage around the access control readers

Deploy a proximity-based access control system that requires the badge to be within 10 cm of the reader

Increase the reader's transmit power to improve the signal-to-noise ratio

A data center uses a 125 kHz proximity card system for entry to the server room. The system uses a challenge-response protocol between the reader and the card. An attacker has placed a relay device near the entrance that forwards the reader's challenge to a remote accomplice, who then relays the card's response back. The relay device is small and hidden, and the attacker's accomplice is standing near an employee's desk. Which mitigation would be most effective against this relay attack while minimizing disruption to authorized employees?

Require a PIN code to be entered after the card is presented

Implement a distance-bounding protocol on the existing 125 kHz system

Replace the 125 kHz system with a 13.56 MHz system that uses a mutual authentication protocol

Increase the reader's polling frequency to reduce the time window for a relay attack

Which mitigation is most effective against relay attacks on LF RFID systems?

Implementing distance bounding protocols

Which of the following is a protective measure against RF jamming of LF RFID systems?

Using frequency hopping spread spectrum

Installing RF shielding around the reader area

GIAC Assessing and Auditing Wireless Networks

Domain 5Objective 1

Low-Frequency RFID Attacks GAWN Practice Questions (Page 5)

Part of the RFID and NFC Attacks domain, which makes up ~17% of our current practice bank. GIAC (SANS) does not publish an official question count, but from its 120-minute exam (~50–80 total, ~9–14 in this domain), expect 3–5 from this objective — we provide 34 practice questions to prepare you well beyond it. (estimate)

34questions here

7free pages

8concepts

Questions 21–25

21foundation · easy
Which countermeasure is most effective in preventing eavesdropping on LF RFID communications?
Select an answer first
22application · medium
A manufacturing facility uses 125 kHz RFID badges for employee access to the production floor. During a security audit, you discover that an attacker could capture badge data from 3 meters away using a custom antenna and software-defined radio. The badges are read-only and cannot be updated. Which control would most effectively mitigate this specific vulnerability without replacing the entire badge system?
Select an answer first
23expert · hard
A data center uses a 125 kHz proximity card system for entry to the server room. The system uses a challenge-response protocol between the reader and the card. An attacker has placed a relay device near the entrance that forwards the reader's challenge to a remote accomplice, who then relays the card's response back. The relay device is small and hidden, and the attacker's accomplice is standing near an employee's desk. Which mitigation would be most effective against this relay attack while minimizing disruption to authorized employees?
Select an answer first
24foundation · easy
Which mitigation is most effective against relay attacks on LF RFID systems?
Select an answer first
25foundation · easy
Which of the following is a protective measure against RF jamming of LF RFID systems?
Select an answer first

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Low-Frequency RFID Attacks GAWN Practice Questions (Page 5)

Questions 21–25

Which countermeasure is most effective in preventing eavesdropping on LF RFID communications?

Which mitigation is most effective against relay attacks on LF RFID systems?

Which of the following is a protective measure against RF jamming of LF RFID systems?

Keep studying — RFID and NFC Attacks