Ciphertext Study guides, Class notes & Summaries
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![AQA A-level COMPUTER SCIENCE 7517/2 Paper 2 Version: 1.0 Final *JUN237517201* IB/G/Jun23/E7 7517/2QUESTION PAPER & MARKING SCHEME/ [MERGED] Mark scheme June 2023](/docpics/4377475/65b98911caaa7_4377475_121_171.jpeg)
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AQA A-level COMPUTER SCIENCE 7517/2 Paper 2 Version: 1.0 Final *JUN237517201* IB/G/Jun23/E7 7517/2QUESTION PAPER & MARKING SCHEME/ [MERGED] Mark scheme June 2023
- Exam (elaborations) • 73 pages • 2024
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AQA 
A-level 
COMPUTER SCIENCE 
7517/2 
Paper 2 
Version: 1.0 Final 
*JUN* 
IB/G/Jun23/E7 7517/2 
For Examiner’s Use 
Question Mark 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
TOTAL 
Monday 19 June 2023 Morning Time allowed: 2 hours 30 minutes 
Materials 
For this paper you must have: 
• a calculator. 
Instructions 
• Use black ink or black ball-point pen. 
• Fill in the boxes at the top of this page. 
• Answer all questions. 
• You must answer the questions in the spaces provided. Do no...
![Computer Security Principles and Practice 4th Edition By William Stallings - Test Bank](/docpics/3469222/650ada5ed3493_3469222_121_171.jpeg)
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Computer Security Principles and Practice 4th Edition By William Stallings - Test Bank
- Exam (elaborations) • 176 pages • 2023 Popular
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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...
![WGU C836 Fundamentals of Information Security Final Exam | Questions and Verified Answers| 2023/ 2024 Update](/docpics/3394137/64fa2a9d7804c_3394137_121_171.jpeg)
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WGU C836 Fundamentals of Information Security Final Exam | Questions and Verified Answers| 2023/ 2024 Update
- Exam (elaborations) • 43 pages • 2023
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WGU C836 Fundamentals of Information Security Final Exam | Questions and Verified Answers| 2023/ 2024 Update 
 
Q: What process ensures compliance with applicable laws, policies, and other bodies of administrative control, and detects misuse? This task contains the radio buttons and checkboxes for options. The shortcut keys to perform this task are A to H and alt+1 to alt+9. 
 
A. Nonrepudiation 
B. Deterrence 
C. Auditing 
D. Accountability 
E. Authorization 
 
 
Answer: 
C. Auditing 
 
Lesson...
![Cryptography and Network Security Principles and Practice 8th Edition, William Stallings (SOLUTION MANUAL, 2024), All Chapters 1-20 Covered |Latest Complete Guide A+.](/docpics/4299118/65ae90dea6ba7_4299118_121_171.jpeg)
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Cryptography and Network Security Principles and Practice 8th Edition, William Stallings (SOLUTION MANUAL, 2024), All Chapters 1-20 Covered |Latest Complete Guide A+.
- Exam (elaborations) • 103 pages • 2024
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Cryptography and Network Security Principles and Practice 8th Edition, William Stallings (SOLUTION MANUAL, 2024), All Chapters 1-20 Covered, Latest Guide A+. 
TABLE OF CONTENTS 
Chapter 1: Introduction..............................................................................................5 
Chapter 2: Classical Encryption Techniques ............................................................7 
Chapter 3: Block Ciphers and the Date Encryption Standard .............................. 13 
Cha...
![WGU Course C839 - Intro to Cryptography Exam 2022 completely Solved](/docpics/63978b9133c6d_2174994.jpg)
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WGU Course C839 - Intro to Cryptography Exam 2022 completely Solved
- Exam (elaborations) • 34 pages • 2022
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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 User B an encrypted message that onl...
![WGU C839 EXAM 100 REAL OA EXAM QUESTIONS AND CORRECT ANSWERS 2023-2024 (VERIFIED ANSWERS)|AGRADE](/docpics/63d82df51e87c_2318129.jpg)
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WGU C839 EXAM 100 REAL OA EXAM QUESTIONS AND CORRECT ANSWERS 2023-2024 (VERIFIED ANSWERS)|AGRADE
- Exam (elaborations) • 29 pages • 2023
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WGU C839 EXAM 100 REAL OA EXAM QUESTIONS AND CORRECT ANSWERS 2023-2024 (VERIFIED ANSWERS)|AGRADE 
 
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 User B an encrypted message that only User B can read, User A must encrypt message with which of the following keys? 
 
A User A's public key 
B User A's private key 
C User ...
![WGU C839 - Intro to Cryptography with 100% Verified Questions And Answers](/docpics/3518635/651581e1848a4_3518635_121_171.jpeg)
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WGU C839 - Intro to Cryptography with 100% Verified Questions And Answers
- Exam (elaborations) • 35 pages • 2023
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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...
![WGU C839 - Introduction to Cryptography| 190 QUESTIONS| WITH COMPLETE SOLUTIONS.](/docpics/6447be38b91f8_2653492.jpg)
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WGU C839 - Introduction to Cryptography| 190 QUESTIONS| WITH COMPLETE SOLUTIONS.
- Exam (elaborations) • 19 pages • 2023
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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...
![C810 Foundations in Healthcare Data Management 2023.2024 verified to pass](/docpics/3741039/65420d59a7727_3741039_121_171.jpeg)
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C810 Foundations in Healthcare Data Management 2023.2024 verified to pass
- Exam (elaborations) • 26 pages • 2023
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C810 Foundations in Healthcare Data ManagementUS Constitution - correct answer Which of the following sources of law is the highest law in the United States? 
 
Common Law - correct answer Which of the following four sources of law derives from the English common law and is also known as judge-made or case law? 
 
plaintiff - correct answer The party in a civil case that brings the action and has the burden of proof is the 
 
defendent - correct answer The party who allegedly committed the wrong...
![WGU C839 EXAM 100 REAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)|AGRAD](/docpics/2972492/649aedd7397d8_2972492_121_171.jpeg)
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WGU C839 EXAM 100 REAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)|AGRAD
- Exam (elaborations) • 29 pages • 2023
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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 User B an encrypted message that only User B can 
read, User A must encrypt message with which of the following keys? 
A User A's public key 
B User A's private key 
C User B's public key 
D User B's private key 
C
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