Des block size Study guides, Class notes & Summaries
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CSIA 300 Final Prep | 100% Correct Answers | Verified | Latest 2024 Version
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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? - Operation and maintenance 
What is the effective key size of DES? - 56 bit 
What are two types of ciphers? - Transposition and substitution 
When block chaining cryptography is used, what type of code is calculated and appended to the data to 
ensure authenticity? - Message authentication code 
Which of the following is the ...
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Certified Encryption Specialist Practice Questions and Answers Latest 2024-2025 Graded A+.
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Certified Encryption Specialist Practice Questions and Answers Latest Graded A+. The most widely used asymmetric encryption algorithm is what? 
+Caesar Cipher 
+Vigenere 
+RSA 
+DES - Answer RSA 
The RSA encryption algorithm is one of the most widely used public key encryption 
algorithms that have ever been invented. It was created by the three scientists 
Ronald Rivest, Adi Shamir, and Leonard Adleman in 1977, and today it is 
increasingly being used in the network area. 
Original, unencrypte...
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WGU Course C839 - Intro to Cryptography Quizlet by Brian MacFarlane exam questions and answers
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What type of encryption uses different keys to encrypt and decrypt the message? 
 
A Symmetric 
B Private key 
C Secure 
D Asymmetric 
D 
 
 
 
The most widely used asymmetric encryption algorithm is what? 
 
A RSA 
B Vigenere 
C DES 
D Caesar Cipher 
A 
 
 
 
Original, unencrypted information is referred to as ____. 
 
A text 
B plaintext 
C cleantext 
D ciphertext 
B 
 
 
 
Which of the following is NOT an asymmetric system? 
 
A PGP 
B RSA 
C SSL 
D DES 
D 
 
 
 
In order for User A to send U...
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CRY 303c Final Exam | Questions with complete solutions
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CRY 303c Final Exam | Questions with complete solutions Which of the following violate Kerckhoff's principle? Select all that are applicable. A. A company states that its system is "secure" because it uses confidential and proprietary protocols. B. The company password is written using an invisible ink, and only the people within the company know the fact that invisible ink is used. C. The algorithms for popular symmetric ciphers such as DES and AES are publicly known. D. The attacker has t...
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Certified Encryption Specialist Practice Questions and Answers Latest Update 2024-2025.
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Certified Encryption Specialist Practice Questions and Answers Latest . What type of encryption uses different keys to encrypt and decrypt the message? 
+Secure 
+Asymmetric 
+Private key 
+Symmetric - Answer Asymmetric 
Asymmetric cryptography, also known as public key cryptography, uses public and 
private keys to encrypt and decrypt data. 
The most widely used asymmetric encryption algorithm is what? 
+Caesar Cipher 
+Vigenere 
+RSA 
+DES - Answer RSA 
The RSA encryption algorithm is one of t...
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Certified Encryption Specialist Practice Questions and Answers Latest 2024/2025 | 100% Correct.
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Certified Encryption Specialist Practice Questions and Answers Latest 2024/2025 | 100% Correct. The most widely used asymmetric encryption algorithm is what? 
+Caesar Cipher 
+Vigenere 
+RSA 
+DES - Answer RSA 
The RSA encryption algorithm is one of the most widely used public key encryption 
algorithms that have ever been invented. It was created by the three scientists 
Ronald Rivest, Adi Shamir, and Leonard Adleman in 1977, and today it is 
increasingly being used in the network area. 
Origin...
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WGU C839 - Introduction to Cryptography Real Exam With Complete Solutions
- Exam (elaborations) • 21 pages • 2023
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WGU C839 - Introduction to Cryptography 
Real Exam With Complete Solutions 
 
Symmetric Block Cipher 
Block Size: 64 bits 
Key Size: 128 bits ---------- Correct Answer -------- IDEA (International Data Encryption 
Algorithm) 
Symmetric Block Cipher 
Block Size: 64 bit blocks 
Key Size: 40 to 128 bits 
Two versions: 128 and 256 ---------- Correct Answer -------- CAST 128/256 
Symmetric Block Cipher 
Block Size: 128 bits 
Key Size: 128, 192, or 256 bits 
Rounds: 32 
Network: Substitution-Permut...
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WGU Course C839 - Intro to Cryptography | 293 Questions And Answers Already Graded A+
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What type of encryption uses different keys to encrypt and decrypt the message? 
A Symmetric 
B Private key 
C Secure 
D Asymmetric - D 
The most widely used asymmetric encryption algorithm is what? 
A RSA 
B Vigenere 
C DES 
D Caesar Cipher - A 
Original, unencrypted information is referred to as ____. 
A text 
B plaintext 
C cleantext 
D ciphertext - B 
Which of the following is NOT an asymmetric system? 
A PGP 
B RSAC SSL 
D DES - D 
In order for User A to send User B an encrypted message tha...
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CEH V11 Cheat Sheet 1 with Revised Answers
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CEH V11 Cheat Sheet 1 with Revised Answers 
Regional Registry Coverage Map - Answer-North America - ARIn 
South America - Lacnic 
Europe - Ripe 
Africa - AFRINIC 
Asia - APNIC 
 
Symmetric Encryption - Answer-Type of cryptography. secret-key, shared-key-private key.) uses same key for encryption and decryption. 
 
DES - Answer-Symmetric Algo. Data Encryption Standard - the archetypal block cipher. Designed to encipher and decipher blocks of data consisting of 64 bits under control of a 56bit key...
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ECES Cryptography Algorithms keys/block size 100% Correct
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ECES Cryptography Algorithms keys/block size 100% Correct DES Symmetric Block Key size: 56 Block size: 64 Feistel Cipher w/ 16 rounds, 48 bit key for each round. Use of 8 S-boxes 
3DES (Triple DES) Symmetric Block Key size: 56 Block size: 64 Performs DES function 3 times w/ 3 different keys. 
DESx Variation of DES that employs key whitening. XOR a 64 bit key with the text before the round function, after or both. 
Advanced Encryption Standard (AES) Symmetric Block Key size: 128, 192, or 256 
Blo...
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