WGU C839V5 / D334 ADDITIONAL PRACTICE EXAM REVIEW 2026/2027 |
INTRODUCTION TO CRYPTOGRAPHY | HIGH-YIELD QUESTIONS & VERIFIED
ANSWERS | COMPREHENSIVE STUDY GUIDE | UPDATED VERSION
1. What classification does the Camelia algorithm fall under?
Public key infrastructure
Asymmetric encryption algorithm
Symmetric block cipher
Hash function
2. What is the maximum key size that can be used with the RC2 encryption
algorithm?
40
64
128
256
3. If an organization decides to use RC2 with a key size of 40 bits, what
potential risks might they face?
Enhanced encryption strength.
Increased vulnerability to brute-force attacks.
Improved data integrity.
Reduced computational overhead.
4. On average how often is a new block of bitcoin mined?
24 hours
10 minutes
, 1 hour
1 month
5. Describe the significance of the 40-bit key length in WEP's use of RC4
encryption.
The 40-bit key length in WEP provides a basic level of security, but
it is considered weak by modern standards.
The 40-bit key length in WEP is the strongest encryption available.
The 40-bit key length in WEP is sufficient for all types of data
transmission.
The 40-bit key length in WEP is used to enhance data integrity.
6. Describe the main difference between DER and PEM encoding schemes for
x.509 certificates.
DER is a binary format, while PEM is a Base64 encoded format with
header and footer.
DER is a text format, while PEM is a binary format.
DER is used for public keys, while PEM is used for private keys.
DER and PEM are identical in function and usage.
7. What cryptographic method is utilized in the Elli solution for secure
communication in RFID systems?
Symmetric Key Encryption
Hash Functions
RSA
Elliptic Curves
,8. Which key does a recipient use to verify a digitally signed message in public
key cryptography?
Sue's private key
Shawn's public key
Shawn's private key
Sue's public key
9. What is the key size in bits for the light-weight symmetric stream cipher
Mickey v2?
128
80
10. Describe the significance of using a 128-bit key in WPA's RC4 encryption.
A 128-bit key is the only option available for WPA.
A 128-bit key is primarily used for data compression.
A 128-bit key is less secure than a 40-bit key.
A 128-bit key provides a higher level of security compared to
shorter keys.
11. What is the definition of the modulo operation?
The modulo operation finds the remainder after division of one
number by another.
The modulo operation multiplies two numbers together.
The modulo operation subtracts one number from another.
The modulo operation adds two numbers.
, 12. What is the term for a processor that manages hardware-level encryption?
GPU
RAM
TPM
CPU
13. Which of the following is a characteristic of non-cryptographic hash
functions like Buzhash and Cityhash?
They are used exclusively for cryptographic purposes.
They require complex algorithms for implementation.
They provide strong security against collisions.
They are designed for speed and efficiency rather than security.
14. What type of algorithms are used to establish a fingerprint in cryptography?
Symmetric
Hash
Asymmetric
Encryption
15. If a software application requires fast data retrieval and does not need
strong security, which type of hash function would be most appropriate to
use?
Quantum hash function
Non-cryptographic hash function
Cryptographic hash function
INTRODUCTION TO CRYPTOGRAPHY | HIGH-YIELD QUESTIONS & VERIFIED
ANSWERS | COMPREHENSIVE STUDY GUIDE | UPDATED VERSION
1. What classification does the Camelia algorithm fall under?
Public key infrastructure
Asymmetric encryption algorithm
Symmetric block cipher
Hash function
2. What is the maximum key size that can be used with the RC2 encryption
algorithm?
40
64
128
256
3. If an organization decides to use RC2 with a key size of 40 bits, what
potential risks might they face?
Enhanced encryption strength.
Increased vulnerability to brute-force attacks.
Improved data integrity.
Reduced computational overhead.
4. On average how often is a new block of bitcoin mined?
24 hours
10 minutes
, 1 hour
1 month
5. Describe the significance of the 40-bit key length in WEP's use of RC4
encryption.
The 40-bit key length in WEP provides a basic level of security, but
it is considered weak by modern standards.
The 40-bit key length in WEP is the strongest encryption available.
The 40-bit key length in WEP is sufficient for all types of data
transmission.
The 40-bit key length in WEP is used to enhance data integrity.
6. Describe the main difference between DER and PEM encoding schemes for
x.509 certificates.
DER is a binary format, while PEM is a Base64 encoded format with
header and footer.
DER is a text format, while PEM is a binary format.
DER is used for public keys, while PEM is used for private keys.
DER and PEM are identical in function and usage.
7. What cryptographic method is utilized in the Elli solution for secure
communication in RFID systems?
Symmetric Key Encryption
Hash Functions
RSA
Elliptic Curves
,8. Which key does a recipient use to verify a digitally signed message in public
key cryptography?
Sue's private key
Shawn's public key
Shawn's private key
Sue's public key
9. What is the key size in bits for the light-weight symmetric stream cipher
Mickey v2?
128
80
10. Describe the significance of using a 128-bit key in WPA's RC4 encryption.
A 128-bit key is the only option available for WPA.
A 128-bit key is primarily used for data compression.
A 128-bit key is less secure than a 40-bit key.
A 128-bit key provides a higher level of security compared to
shorter keys.
11. What is the definition of the modulo operation?
The modulo operation finds the remainder after division of one
number by another.
The modulo operation multiplies two numbers together.
The modulo operation subtracts one number from another.
The modulo operation adds two numbers.
, 12. What is the term for a processor that manages hardware-level encryption?
GPU
RAM
TPM
CPU
13. Which of the following is a characteristic of non-cryptographic hash
functions like Buzhash and Cityhash?
They are used exclusively for cryptographic purposes.
They require complex algorithms for implementation.
They provide strong security against collisions.
They are designed for speed and efficiency rather than security.
14. What type of algorithms are used to establish a fingerprint in cryptography?
Symmetric
Hash
Asymmetric
Encryption
15. If a software application requires fast data retrieval and does not need
strong security, which type of hash function would be most appropriate to
use?
Quantum hash function
Non-cryptographic hash function
Cryptographic hash function
