Hash functions Study guides, Class notes & Summaries
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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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PCI ISA Exam Question And Answers 2022
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For PCI DSS requirement 1, firewall and router rule sets need to be reviewed every _____________ months 
6 months 
 
 
 
Non-console administrator access to any web-based management interfaces must be encrypted with technology such as......... 
HTTPS 
 
 
 
Requirements 2.2.2 and 2.2.3 cover the use of secure services, protocols and daemons. Which of the following is considered to be secure? 
SSH, TLS, IPSEC, VPN 
 
 
 
Which of the following is considered "Sensitive Authentication Data"? 
Car...
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CREST CPSA Exam Questions and Answers
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Name all OSI layers - THE CORRECT ANSWER IS Application, Presentation, Session, Transport, Network, Data Link, Physical. 
 
Name all TCP/IP layers - THE CORRECT ANSWER IS Application, Transport, internet, Network Access. 
 
Name Four TCP head flags - THE CORRECT ANSWER IS ACK, FIN, SYN, URG, PSH, RST 
 
Which layer does HTTP protocl reside in the OSI model. - THE CORRECT ANSWER IS Layer 7, Application. 
 
Which layer does Ethernet reside in the OSI model. - THE CORRECT ANSWER IS Layer 2, Data li...
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HW4 Solution University of Michigan EECS 484
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Question 1 (20 points) 
1.1) (6 points) 
Block Nested Loops Join 
(A) Reads = |R| + |S| * ceil(|R|/(B-2)) = 5,000 + 15,000 * ceil(5,000/(800-2)) = 110,000 
(B) Writes = 0 (no writes are required for nested loops joins) 
1.2) (7 points) 
Grace Hash Join 
(A) Reads in Partition phase = |R| + |S| = 20,000 
Reads in Probe phase = |R| + |S| = 20,000 
Total reads = 2 * (|R| + |S|) = 40,000 
(B) Total writes = |R| + |S| = 20,000 
1.3) (7 points) 
BNJ = 110,000 * 1 [reads; no writes] = 110,000 
GHJ = 40...
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HW4 Solution - F19 University of Michigan EECS 484
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Question 1 (20 points) 
2.1) (4 points) B - 1 buckets 
2.2) (4 points) Recursively apply hash-based projection technique to further split the buckets with 
different hash functions until no more partition overflow. 
2.3) (4 points) (B - 1)^2 buckets 
2.4) (4 points) Accelerate the record matching in memory or reduce CPU cost of record matching. 
2.5) (4 points) No. In the probing phase, using the same hash function will assign each data record into 
the same bucket. No speeding up for join in th...
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Data Structures and Algorithms I - C949 WGU With Correct Answers.
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Algorithm efficiency 
typically measured by the algorithm's computational complexity 
 
 
 
Computational complexity 
the amount of resources used by the algorithm. The most common resources considered are the runtime and memory usage. 
 
 
 
runtime complexity 
a function, T(N), that represents the number of constant time operations performed by the algorithm on an input of size N 
 
 
 
Space-complexity (of an algorithm) 
a function, S(N), that represents the number of fixed-size memory units...
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WGU C949 - Data Structures And Algorithms QUESTIONS WITH COMPLETE SOLUTIONS
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WGU C949 - Data Structures And Algorithms QUESTIONS WITH COMPLETE SOLUTIONS Algorithm 
Describes a sequence of steps to solve a computational problem or perform a calculation. 
 
 
Computational Problem 
Specifies an input, a question about the input that can be answered using a computer, and the desired output. 
 
 
 
 
 
00:20 
01:45 
Longest Common Substring 
An algorithm that determines the longest common substring that exists in two inputs strings. 
 
 
Binary Search 
An efficient algorithm...
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CASP Exam Questions With Complete Solutions
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Key Stretching correct answer: -A cryptographic technique that makes a weak key stronger by increasing the time it takes to test each possible key. In key stretching, the original key is fed into an algorithm to produce an enhanced key, which should be at least 128 bits for effectiveness. 
-Systems that use key stretching include Pretty Good Privacy (PGP), GNU Privacy Guard (GPG), Wi-Fi Protected Access (WPA), and WPA2. Widely used password key stretching algorithms include Password-Based Key D...
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CompTIA Security+ SY0-601 Practice Questions ALL SOLUTION & ANSWERS 100% CORRECT ANSWERS SPRING FALL-2023/24 EDITION GUARANTEED GRADE A+
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The user installed Trojan horse malware. 
A user used an administrator account to download and install a software application. After the user launched the .exe extension installer file, the user experienced frequent crashes, slow computer performance, and strange services running when turning on the computer. What most likely happened to cause these issues? 
A worm 
A security operations center (SOC) analyst investigates the propagation of a memory-resident virus across the network and notices a...
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Secure Software Design Study Guide - C706 Questions and Answers with Verified Solutions
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Confidentiality - Information is not made available or disclosed to unauthorized individuals, 
entities, or processes. Ensures unauthorized persons are not able to read private and sensitive 
data. It is achieved through cryptography. 
Integrity - Ensures unauthorized persons or channels are not able to modify the data. It is 
accomplished through the use of a message digest or digital signatures. 
Availability - The computing systems used to store and process information, the security 
controls...