1|Page
WGU C839 OBJECTIVE ASSESSMENT FINAL/WGU C839
INTRODUCTION TO CRYPTOGRAPHY LATEST 2025/2026 ACTUAL
EXAM WITH COMPLETE QUESTIONS AND CORRECT DETAILED
ANSWERS (100% VERIFIED ANSWERS) |ALREADY GRADED A+|
||PROFESSOR VERIFIED|| ||BRANDNEW!!!||
U.S. Patent 5,231,668 and FIPS 186 define what algorithm?
A AES
B RSA
C Elliptic Curve (EC)
D Digital Signature Algorithm (DSA) - ANSWER-D
What is X.509?
A The standard for PGP certificates
B The standard for encrypting email
C The standard for FIPS 186
D The standard for digital certificates - ANSWER-D
What is contained in a CRL?
,2|Page
A Keys for RSA
B New certificates
C Revoked certificates
D Keys for AES - ANSWER-C
What does the Online Certificate Status Protocol (OCSP)
provide?
A Revoked certificates
B Hashing
C VPN connectivity
D Encryption - ANSWER-A
In terms of cryptanalysis, what does it mean to break a cipher?
A finding a method to decrypt a message that is at least twice as
efficient as brute force
,3|Page
B trying every possible key until you can decrypt the message
C deploying an algorithm that uses a 228 bit key
D finding any method to decrypt the message that is more
efficient than brute force - ANSWER-D
An authentication method that periodically re-authenticates the
client by establishing a hash that is then resent from the client is
called ______.
A PAP
B CHAP
C SPAP
D EAP - ANSWER-B
What is a TGS?
A The server that grants Kerberos tickets
, 4|Page
B protocol for encryption
C protocol for key exchange
D The server that escrows keys - ANSWER-A
What is Kerchoff's principle?
A A minimum key size of 256 bits is necessary for security.
B Both algorithm and key should be kept secret.
C A minimum of 15 rounds is needed for a Feistel cipher to be
secure.
D Only the key needs to be secret, not the actual algorithm. -
ANSWER-D
Which of the following is a fundamental principle of cryptography
that holds that the algorithm can be publically disclosed without
damaging security?
A Babbage's principle
B Kerkchoff's principle
WGU C839 OBJECTIVE ASSESSMENT FINAL/WGU C839
INTRODUCTION TO CRYPTOGRAPHY LATEST 2025/2026 ACTUAL
EXAM WITH COMPLETE QUESTIONS AND CORRECT DETAILED
ANSWERS (100% VERIFIED ANSWERS) |ALREADY GRADED A+|
||PROFESSOR VERIFIED|| ||BRANDNEW!!!||
U.S. Patent 5,231,668 and FIPS 186 define what algorithm?
A AES
B RSA
C Elliptic Curve (EC)
D Digital Signature Algorithm (DSA) - ANSWER-D
What is X.509?
A The standard for PGP certificates
B The standard for encrypting email
C The standard for FIPS 186
D The standard for digital certificates - ANSWER-D
What is contained in a CRL?
,2|Page
A Keys for RSA
B New certificates
C Revoked certificates
D Keys for AES - ANSWER-C
What does the Online Certificate Status Protocol (OCSP)
provide?
A Revoked certificates
B Hashing
C VPN connectivity
D Encryption - ANSWER-A
In terms of cryptanalysis, what does it mean to break a cipher?
A finding a method to decrypt a message that is at least twice as
efficient as brute force
,3|Page
B trying every possible key until you can decrypt the message
C deploying an algorithm that uses a 228 bit key
D finding any method to decrypt the message that is more
efficient than brute force - ANSWER-D
An authentication method that periodically re-authenticates the
client by establishing a hash that is then resent from the client is
called ______.
A PAP
B CHAP
C SPAP
D EAP - ANSWER-B
What is a TGS?
A The server that grants Kerberos tickets
, 4|Page
B protocol for encryption
C protocol for key exchange
D The server that escrows keys - ANSWER-A
What is Kerchoff's principle?
A A minimum key size of 256 bits is necessary for security.
B Both algorithm and key should be kept secret.
C A minimum of 15 rounds is needed for a Feistel cipher to be
secure.
D Only the key needs to be secret, not the actual algorithm. -
ANSWER-D
Which of the following is a fundamental principle of cryptography
that holds that the algorithm can be publically disclosed without
damaging security?
A Babbage's principle
B Kerkchoff's principle
