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WGU C839 OBJECTIVE ASSESSMENT FINAL INTRODUCTION TO CRYPTOGRAPHY EXAM WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED ANSWERS |FREQUENTLY TESTED QUESTIONS AND SOLUTIONS |ALREADY GRADED A+|BRAND NEW!!!|GUARANTEED PASS |LATEST UPDATE$24.99
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WGU C839 OBJECTIVE ASSESSMENT FINAL INTRODUCTION TO CRYPTOGRAPHY EXAM WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED ANSWERS |FREQUENTLY TESTED QUESTIONS AND SOLUTIONS |ALREADY GRADED A+|BRAND NEW!!!|GUARANTEED PASS |LATEST UPDATE
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Course
WGU C839
Institution
WGU C839
WGU C839 OBJECTIVE ASSESSMENT FINAL
INTRODUCTION TO CRYPTOGRAPHY EXAM
WITH ACTUAL CORRECT
QUESTIONS AND VERIFIED DETAILED
ANSWERS |FREQUENTLY TESTED
QUESTIONS AND SOLUTIONS |ALREADY
GRADED A+|BRAND NEW!!!|GUARANTEED
PASS |LATEST UPDATE
WGU C839 OBJECTIVE ASSESSMENT FINAL
INTRODUCTION TO CRYPTOGRAPHY EXAM
2024-2025 WITH ACTUAL CORRECT
QUESTIONS AND VERIFIED DETAILED
ANSWERS |FREQUENTLY TESTED
QUESTIONS AND SOLUTIONS |ALREADY
GRADED A+|BRAND NEW!!!|GUARANTEED
PASS |LATEST UPDATE
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.
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
C Vigenere's principle
D Shamir's principle
B
A process that puts a message into the least significant bits of a binary file is called what?
A Symmetric cryptography
B Masking
C Steganography
D Asymmetric cryptography
C
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,If you wished to see a list of revoked certificates from a CA, where would you look?
A CRL
B CA
C RFC
D RA
A
Which of the following is generally true about block ciphers?
A Secret block ciphers should be trusted.
B Block ciphers permute the bits of the input plaintext.
C The plaintext and ciphertext are always the same size.
D A block cipher is an encryption function for variable-size blocks of data.
C
What does the OCSP protocol provide?
A encryption
B VPN connectivity
C hashing
D a real time protocol for verifying certificates
D
U.S. encryption standard that replaced DES. Block symmetric cipher that uses 128-bit block sizes and
various key lengths (128, 192, 256).
AES
DES, 3DES, SHA, AES (some AES implementations are Type I)
Class 3 Algorithms
Encryption method where the sender and receiver use an instance of the same key for encryption and
decryption purposes.
Symmetric
Block symmetric algorithm chosen by NIST as an encryption standard in 1976. It uses a 56-bit true key
bit size, 64-bit block size, and 16 rounds of computation.
Data Encryption Standard (DES)
technical specification indicating how multimedia data and e-mail binary attachments are to be
transferred.
Multipurpose Internet Mail Extensions (MIME)
2|Page
,Valid data transmission is maliciously or fraudulently repeated to allow an entity gain unauthorized
access.
Replay Attack
protocol suite that provides a method of setting up a secure channel for protected data exchange
between two devices.
Component of a PKI that creates and maintains digital certificates throughout their life cycles.
Certificate Authority
Uses public key encryption and provides data encryption, server authentication, message integrity, and
optional client authentication.
It is currently at version 3.0.
Secure Sockets Layer (SSL)
Manipulating individuals so that they will divulge confidential information, rather than by breaking in or
using technical cracking techniques.
Social engineering attack
Cryptanalysis attack where the attacker is assumed to have access only to a set of ciphertexts.
Ciphertext-only attack
servers and software signing, for which independent verification and checking of identity and authority
is done by issuing CA
Class 3 Certificates
it should be impossible for any attacker to calculate, or otherwise guess, from any given subsequence,
any previous or future values in the sequence
BSI Criteria K3 states
Cryptanalysis attack that uses identified statistical patterns.
Statistical attack
organizations for which proof of identity is required
Class 2 Certificates
3|Page
, Block symmetric cipher that uses a 128-bit key and 64-bit block size.
International Data Encryption Algorithm (IDEA)
individuals, and intended for email
Class 1 Certificates
A form of cryptanalysis applicable to symmetric key algorithms that was invented by Eli Biham and Adi
Shamir.
The examination of differences in an input and how that affects the resultant difference in the output.
Differential cryptanalysis
Cryptanalysis attack where the attacker is assumed to have access to sets of corresponding plaintext and
ciphertext.
Known plaintext attack
Carries out real-time validation of a certificate and reports back to the user whether the certificate is
valid, invalid, or unknown.
______________ checks the CRL that is maintained by the CA.
Online Certificate Status Protocol (OCSP)
What is the formula Me%n related to?
Encrypting with RSA
Plain-text is equal to the encryption function (E) with the key (k) and the ciphertext (c) being passed as
parameters to that function
P= E(k,c) Symmetric decryption
Not certified for government use
Class 4 algorithms
64 bit algorithm operating at 56 bits with an 8 bit parity block
DES
___ is the authenticating protocol, and _____ is an authenticating and encrypting protocol that uses
cryptographic mechanisms to provide source authentication, confidentiality, and message integrity.
Authentication Header (AH) and Encapsulating Security Payload (ESP).
developed as a Russian national standard and produced fixed length outputs of 256 bits
GOST
A measure of the uncertainty associated with a random variable
Entropy
4|Page
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