Hash function Samenvattingen, Aantekeningen en Examens

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...

What type of security training is specifically designed to educate employees about attack techniques? - ️️capture the flag Linda's organization recently experienced a social engineering attack. The attacker called a help desk employee and persuaded her that she was a project manager on a tight deadline and locked out of her account. The help desk technician provided the attacker with access to the account. What social engineering principle was used? - ️️urgency What type of phishin...

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...

WGU C839 Questions and Answers 100% Pass Symmetric Which encryption standard uses the same key to encrypt and decrypt messages? Skipjack Which algorithm is designated as a Type 2 product by the National Security Agency (NSA)? X.509 v3 What is the most commonly used format for certificates? Certificate revocation list (CRL) What is referenced to determine if a certificate has been revoked? Sender's public key What needs to be installed on end users' computers to allow them to trust applicat...

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...

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...

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...

EECS 484 F19 - Homework 4 Deadline -- 6:00 PM on Tuesday, Nov 26th, 2019 Deliverables: You need to submit all your solutions in a single PDF on Gradescope. Your solutions can be either handwritten or created electronically, as long as they are clear. This homework is to be done in teams of 2 students; individual work is permitted, but not recommended. Both members of each team will receive the same score; as such, it is not necessary for each team member to submit the assignment. Create ...

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...

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...