GPEN · Question #9
Which of the following encryption modes are possible in WEP? Each correct answer represents a complete solution. Choose all that apply.
The correct answer is A. No encryption C. 128 bit encryption D. 40 bit encryption. WEP supports three encryption modes - no encryption, 64-bit (using a 40-bit key plus 24-bit IV), and 128-bit (using a 104-bit key plus 24-bit IV); 256-bit is not part of the WEP standard.
Question
Which of the following encryption modes are possible in WEP? Each correct answer represents a complete solution. Choose all that apply.
Options
- ANo encryption
- B256 bit encryption
- C128 bit encryption
- D40 bit encryption
How the community answered
(23 responses)- A74% (17)
- B26% (6)
Why each option
WEP supports three encryption modes - no encryption, 64-bit (using a 40-bit key plus 24-bit IV), and 128-bit (using a 104-bit key plus 24-bit IV); 256-bit is not part of the WEP standard.
WEP can be configured in open system mode with no encryption applied, meaning all data is transmitted in plaintext with no confidentiality protection.
256-bit encryption is not a defined mode in the IEEE 802.11 WEP specification; WEP only standardizes open, 64-bit, and 128-bit modes.
128-bit WEP uses a 104-bit secret key combined with a 24-bit initialization vector (IV) to produce the RC4 keystream, and is a defined and widely supported WEP mode.
40-bit WEP (often called 64-bit WEP) uses a 40-bit secret key with a 24-bit IV and represents the original, minimal encryption mode defined in the WEP standard.
Concept tested: WEP encryption modes and key lengths
Source: https://learn.microsoft.com/en-us/windows/win32/nativewifi/wep
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