CISA Certified Information Systems Auditor – Question1866 - CISA Certified Information Systems Auditor

Many WEP systems require a key in a relatively insecure format. What format is this?

A. binary format.
B. hexadecimal format.
C. 128 bit format.
D. 256 bit format.
E. None of the choices.

Correct Answer: B

Explanation:

Explanation:
As part of the IEEE 802.11 standard ratified in September 1999, WEP uses the stream cipher RC4 for confidentiality and the CRC-32 checksum for integrity.
Many WEP systems require a key in hexadecimal format. If one chooses keys that spell words in the limited 0-9, A-F hex character set, these keys can be easily guessed.