Pre-assesment - Introduction to Cryptography - C839 – WGU Latest Update 2024-2025 Exam Questions and 100% Verified Correct Answers Guaranteed A+
- A business wants to use keys issued by a trusted third party to demonstrate to
potential customers that it is a legitimate organization.Which key is used to sign the certificate issued to the business?
Private key of the root CA Public key of the root CA Private key of the company
Public key of the company - CORRECT ANSWER: Private key of the root CA
- What is the key size for RC4 with WEP?
40 bits 128 bits 256 bits
512 bits - CORRECT ANSWER: 40 bits
- Which symmetric encryption technique uses a 56-bit key size and a 64-bit block
size?
AES DES 3DES
IDEA - CORRECT ANSWER: DES
- Which wireless security standard uses a 128-bit RC4 stream cipher for encrypted
communications?
WPA WEP VPN
GSM - CORRECT ANSWER: WPA
- What defines a prime number?
Only has factors of itself and 1 Only has factors of itself and 2 Evenly divisible by 3.14
Evenly divisible by 10 - CORRECT ANSWER: Only has factors of itself and 1
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- What is 29 mod 12?
3 5
7 - CORRECT ANSWER: 5
- What happens to the hash of a file if it is rehashed after the first character of the file
is changed?
The entire hash is different.The beginning of the hash is altered.The hash is unaltered.
The hash algorithm is replaced. - CORRECT ANSWER: The entire hash is different.
- What is the length (in bits) of an MD5 hash output?
32 64 128
256 - CORRECT ANSWER: 128
- How many characters are used in an LM hash password?
7 8 14
16 - CORRECT ANSWER: 14
18. A Windows credential is identified as follows:
user:FDA95FBABC199D22LLD3B435B51876KK:199DDFD4EF0E9CD9KMNC6FE771I
L124B8:::
What is used to store this password?
MD5 Bcrypt
SHA-512
NTLM - CORRECT ANSWER: NTLM
- What is a rainbow table?
List of matching usernames and passwords Precompiled list of common words List of commonly used passwords
Precompiled list of hash values - CORRECT ANSWER: Precompiled list of common
words
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