Hash collision - Study guides, Class notes & Summaries

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 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...

Symmetric CORRECT ANSWERS: Which encryption standard uses the same key to encrypt and decrypt messages? Skipjack CORRECT ANSWERS: Which algorithm is designated as a Type 2 product by the National Security Agency (NSA)? X.509 v3 CORRECT ANSWERS: What is the most commonly used format for certificates? Certificate revocation list (CRL) CORRECT ANSWERS: What is referenced to determine if a certificate has been revoked? Sender's public key CORRECT ANSWERS: What needs to be installed...

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...

Cryptography correct answers Transmitting messages and transactions securely against third party adversaires When we want to make a secure transactions, following has to occur(4) correct answers 1) message comes from right sender 2)1) message comes from right sender is not read by anyone else 3) Message is not altered 4) message is delivered to the right receiver Hashing correct answers -form of cryptography, used for checksum -transforms any text to an arbitrary length -use...

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...

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...

Supervised Learning correct answers Uses a precise rule to predict outcome Ex: Regression Random Forrest (Predict stock returns) Unsupervised Learning correct answers Uncovers relationships/commonalties/patterns between variables without a model/structure (What stocks are similar to each other) Deep Learning correct answers Mimicking how the brain works, uses multi-layered neural network (Detect investor sentiment using social media) Ex; time series (nerual nets) Fin-tech: correc...

CSTM/CPSA REVISION QUESTIONS & ANSWERS. 100% ACCURATE. RATED A+ hping2 can be best described as a program which? sends (almost) arbitrary TCP/IP packets to network hosts 3 multiple choice options Using a password and key-fob to access a web application is an example of? Dual Factor Authentication 3 multiple choice options Consider this MSSQL password hash: 0xceb64afe2b4c442b9f6970d57a30b337ceb5 Which section of this hash is the salt? 4086ceb6 3 multiple choice options A user name is...

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...