Which of the following choices describe a Challenge-response tokens generation?

Which of the following choices describe a Challenge-response tokens generation?
A .  A workstation or system that generates a random challenge string that the user enters into the token when prompted along with the proper PI
C .  A workstation or system that generates a random login id that the user enters when prompted along with the proper PI
E .  A special hardware device that is used to generate ramdom text in a cryptography system.
F .  The authentication mechanism in the workstation or system does not determine if the owner should be authenticated.

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Answer: A

Explanation: Challenge-response tokens are:

-A workstation or system generates a random challenge string and the owner enters the string into the token along with the proper PIN.

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The token generates a response that is then entered into the workstation or system.

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The authentication mechanism in the workstation or system then determines if the owner should be authenticated. Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 37. Also: HARRIS, Shon, All-In-One CISSP Certification Exam Guide, McGraw-Hill/Osborne, 2002, chapter 4: Access Control (pages 136-137).