You work as a technician for Trade Well Inc. The company is in the business of share trading. To enhance security, the company wants users to provide a third key (apart from ID and password) to…

Question

Options

• ASmart cards
• BKey fobs
• CVPN
• DBiometrics

• B
  82% (14)
• C
  12% (2)
• D
  6% (1)

Explanation

Key fobs generate time-based one-time passwords (TOTP) - a rotating numeric code the user physically possesses - making them the ideal "third key" on top of an existing ID and password. The word "key" in the product name is a direct clue: a key fob literally provides a third key for authentication.

Why the others are wrong:

• A. Smart cards - valid authentication hardware, but they typically replace a password rather than supplement it, and require card readers installed at every workstation, making web-based deployment impractical.
• C. VPN - a network tunneling protocol for securing data in transit, not an authentication factor; it doesn't provide a credential the user presents.
• D. Biometrics - a legitimate third factor ("something you are"), but requires specialized scanners at every access point, making it far less practical for web site login than a key fob, which only needs a user to type a code.

Memory tip: The phrase "third key" in the question is your hint - a key fob literally has "key" in its name and physically resembles a key chain device. If an exam question mentions a "token," "fob," or numeric code that changes every 30–60 seconds, that's always a key fob scenario.

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