WGU C839- CRYPTOGRAPHY QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+||BRAND NEW
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? Ans✓✓✓ Private key of the root CA
A business wants to use keys issued by a trusted third party to
demonstrate it is a legitimate organization to potential customers.Which
key should the business send to potential customers to prove its identity?
Ans✓✓✓ Public key of the company
What should an administrator use to import and export all items written
using X.509 that are part of a chain of trust? Ans✓✓✓ Public Key
Cryptography Standard (PKCS) #12
Which field displays the hash, or digest, of the certificate in an X.509
certificate? Ans✓✓✓ thumbprint
Employee B sends Employee A an encrypted message.What does
Employee A use to decrypt the message from Employee B? Ans✓✓✓
Employee A's private key
What is an example of a symmetric algorithm? Ans✓✓✓ AES
, Which two components involved in performing encryption are known to
the party that will perform decryption before symmetric encryption is
applied?Choose 2 answers. Ans✓✓✓ Cryptographic algorithm &
Cryptographic key
Employee A created a secret key and wants to send it to Employee B
without any coworkers being able to decrypt the message.Which key
needs to encrypt the message? Ans✓✓✓ Employee B's public key
Which type of cipher is ChaCha? Ans✓✓✓ stream
What is the key size for RC4 with WEP? Ans✓✓✓ 40 bits
Which symmetric encryption technique uses a 56-bit key size and a 64-
bit block size? Ans✓✓✓ DES
Which wireless security standard uses a 128-bit RC4 stream cipher for
encrypted communications? Ans✓✓✓ WPA
What defines a prime number? Ans✓✓✓ Only has factors of itself and 1
What is 29 mod 12? Ans✓✓✓ 5
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+||BRAND NEW
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? Ans✓✓✓ Private key of the root CA
A business wants to use keys issued by a trusted third party to
demonstrate it is a legitimate organization to potential customers.Which
key should the business send to potential customers to prove its identity?
Ans✓✓✓ Public key of the company
What should an administrator use to import and export all items written
using X.509 that are part of a chain of trust? Ans✓✓✓ Public Key
Cryptography Standard (PKCS) #12
Which field displays the hash, or digest, of the certificate in an X.509
certificate? Ans✓✓✓ thumbprint
Employee B sends Employee A an encrypted message.What does
Employee A use to decrypt the message from Employee B? Ans✓✓✓
Employee A's private key
What is an example of a symmetric algorithm? Ans✓✓✓ AES
, Which two components involved in performing encryption are known to
the party that will perform decryption before symmetric encryption is
applied?Choose 2 answers. Ans✓✓✓ Cryptographic algorithm &
Cryptographic key
Employee A created a secret key and wants to send it to Employee B
without any coworkers being able to decrypt the message.Which key
needs to encrypt the message? Ans✓✓✓ Employee B's public key
Which type of cipher is ChaCha? Ans✓✓✓ stream
What is the key size for RC4 with WEP? Ans✓✓✓ 40 bits
Which symmetric encryption technique uses a 56-bit key size and a 64-
bit block size? Ans✓✓✓ DES
Which wireless security standard uses a 128-bit RC4 stream cipher for
encrypted communications? Ans✓✓✓ WPA
What defines a prime number? Ans✓✓✓ Only has factors of itself and 1
What is 29 mod 12? Ans✓✓✓ 5
