Des block size Study guides, Class notes & Summaries
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WGU C839 - Intro to Cryptography with 100% Verified Questions And Answers
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WGU C839 - Intro to Cryptography with 100% Verified Questions And Answers 
 
 
Which of the following most accurately defines encryption? 
 
A changing a message so it can only be easily read by the intended recipient 
 B Making binary changes to a message to conceal it 
C changing a message using complex mathematics D Applying keys to plain text A 
 
What type of encryption uses different keys to encrypt and decrypt the message? 
 
A Symmetric 
B Private key 
C Secure 
D Asymmetric D 
The m...
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Computer Security Principles and Practice 4th Edition By William Stallings - Test Bank
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Chapter 2 – Cryptographic Tools 
 
TRUE/FALSE QUESTIONS: 
 
T	F	1. Symmetric encryption is used primarily to provide confidentiality. 
T	F	2. Two of the most important applications of public-key encryption are 
 digital signatures and key management. 
 
T	F	3. Cryptanalytic attacks try every possible key on a piece of ciphertext 
 until an intelligible translation into plaintext is obtained. 
 
T 	F	4. The secret key is input to the encryption algorithm. 
 
T	F	5. Triple DES tak...
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WGU C839 - Introduction to Cryptography| 190 QUESTIONS| WITH COMPLETE SOLUTIONS.
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WGU C839 - Introduction to Cryptography | 190 QUESTIONS | WITH COMPLETE SOLUTIONS. 
Serpent CORRECT ANSWERS: Symmetric Block Cipher 
Block Size: 128 bits 
Key Size: 128, 192, or 256 bits 
Rounds: 32 
Network: Substitution-Permutation 
Tiny Encryption Algorithm (TEA) CORRECT ANSWERS: Symmetric Block Cipher 
Block Size: 64 bits 
Key Size: 128 bits 
Cryptography CORRECT ANSWERS: Deciphering secret writings, kryptos means hidden and 
grafo means write. Must not be readable by interlopers over secure...
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WGU C839 Flash Cards for OA| 77 QUESTIONS| WITH COMPLETE SOLUTONS
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DES CORRECT ANSWERS: 64 Bit Block - 56 Bit Key - 16 Rounds 
 
AES CORRECT ANSWERS: 128 Bit Block - 128, 192, 256 Bit Key - 10, 12, 14 Rounds 
 
BlowFish CORRECT ANSWERS: 64 Bit Block - 32 thru 448 Bit Key - 16 Rounds 
 
TwoFish CORRECT ANSWERS: 128 Bit Block - 1 thru 256 Bit Key - 16 Rounds 
 
Serpent CORRECT ANSWERS: 128 Bit Block 128, 192, 256 Bit Key - 32 Rounds 
 
SkipJack CORRECT ANSWERS: 64 Bit Block - 80 Bit Key - 32 Rounds 
 
IDEA CORRECT ANSWERS: 64 Bit Block - 128 Bit Key - 8.5 ...
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WGU C839V5/D334 ADDITIONAL PRACTICE QUESTIONS AND ANSWERS 2024/2025 SOLVED 100%;(VIEW AHEAD OF EXAM STUDY TIPS GUARANTEED SUCCESS)
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WGU C839V5/D334 ADDITIONAL PRACTICE QUESTIONS AND ANSWERS 2024/2025 SOLVED 100%;(VIEW AHEAD OF EXAM STUDY TIPS GUARANTEED SUCCESS) 
 
 
The hash value in bits for MD5 is ____. 
A. 128 
B. 160 
C. 256 ANS- 128 
 
Hashing involves taking a _____ length input and producing a _____ length output (message digest). 
A. fixed; fixed 
B. variable; fixed 
C. fixed; variable ANS- variable; fixed 
 
The hash value in bits for SHA-1 is ____. 
A. 128 
B. 160 
C. 256 ANS- 160 
 
The hash value in bits f...
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WGU C839V5/D334 ADDITIONAL PRACTICE QUESTIONS AND ANSWERS 2024-2025 VERIFIED 100%
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WGU C839V5/D334 ADDITIONAL PRACTICE QUESTIONS AND ANSWERS VERIFIED 100% 
 
 
The hash value in bits for MD5 is ____. 
A. 128 
B. 160 
C. 256 Ans- 128 
 
Hashing involves taking a _____ length input and producing a _____ length output (message digest). 
A. fixed; fixed 
B. variable; fixed 
C. fixed; variable Ans- variable; fixed 
 
The hash value in bits for SHA-1 is ____. 
A. 128 
B. 160 
C. 256 Ans- 160 
 
The hash value in bits for MD4 is ____. 
A. 128 
B. 160 
C. 256 Ans- 128 
 
...
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WGU C839 Flash Cards for OA question & answers 100% correct updated 2022
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WGU C839 Flash Cards for OA question & answers 100% correct updated 2022DES 
64 Bit Block - 56 Bit Key - 16 Rounds 
 
 
 
AES 
128 Bit Block - 128, 192, 256 Bit Key - 10, 12, 14 Rounds 
 
 
 
 
 
 
00:38 
01:41 
BlowFish 
64 Bit Block - 32 thru 448 Bit Key - 16 Rounds 
 
 
 
TwoFish 
128 Bit Block - 1 thru 256 Bit Key - 16 Rounds 
 
 
 
Serpent 
128 Bit Block 128, 192, 256 Bit Key - 32 Rounds 
 
 
 
SkipJack 
64 Bit Block - 80 Bit Key - 32 Rounds 
 
 
 
IDEA 
64 Bit Block - 128 Bit Key - 8.5 Rou...
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Introduction to Cryptography - D334|250 Questions With Well And Correct Answers| Verified|31 Pages
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XOR the following 
 
 
------------------ - ️️ 
 
asymmetric key-based encryption 
-typical methods - ️️RSA 
DSA 
El Gamal 
 
Symmetric key-based encryption 
-Typical Methods - ️️RC2- 40 bit key size 64 bit block 
RC4- (Stream Cipher)- Used in SSL and WEP 
RC5- (Variable Key size, 32, 64, or 128 bit block size) 
AES- (128, 192 or 256 bit key size, 128 bit block size) 
DES- (56 bit key size. 64 bit Block size) 
3DES- (112 bit key size, 64 bit block size) 
 
Block Encryption - ️️R...
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CSIA FINAL EXAM WITH CORRECT SOLUTIONS GRADED A+ |100% VERIFIED|
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Which of the following phases of a system development life-cycle is most concerned with 
authenticating users and processes to ensure appropriate access control decisions? The 
Answer Is :- Operation and maintenance 
What is the effective key size of DES? The Answer Is :- 56 bit 
What are two types of ciphers? The Answer Is :- Transposition and substitution 
When block chaining cryptography is used, what type of code is calculated and appended to the 
data to ensure authenticity? The Answer Is :...
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WGU C839- test Questions and Answers Already Passed
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WGU C839- test Questions and Answers Already Passed What is the block and key size for Blowfish - 64 bit block - 32-448 bit key 
What term from the list below best describes a data concealment for covert communication that makes use of LSB replacement? Steganography 
What term from the list below best describes a data concealment for covert communication that makes use of LSB replacement? Steganography 
Which block cipher below uses a block size of 128 bits and key sizes up to 256 bits? TwoFish ...
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