Des key size - 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 - 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. 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 Objective Assessment Study Guide (Latest 2024/ 2025 Update) Introduction to Cryptography| Qs & As| Grade A| 100% Correct (Verified Answers) Q: Information Theory Answer: -Published by Claude Shannon in 1949 in the Bell System Technical Journal - Important concepts: -Diffusion -Confusion -Avalanche Effect (Horst Feist's variation on Shannon's concept of diffusion Q: Kerckhoff's Principle Answer: -1883 -A crptosystem should be secure even if all its elemen...

WGU C839 Objective Assessment Study Review (Latest 2024/ 2025 Update) Introduction to Cryptography| Qs & As| Grade A| 100% Correct (Verified Answers) Q: A _____ is a function that takes a variable-size input m and returns a fixed-size string. A Symmetric cipher B Hash C Asymmetric cipher D Feistel Answer: B Q: Which of the following is a cryptographic protocol that allows two parties to establish a shared key over an insecure channel? A Elliptic Curve B RSA C MD5 D ...

WGU C839V5/D334 ADDITIONAL PRACTICE QUESTIONS AND ANSWERS VERIFIED 100% The hash value in bits for MD5 is ____. A. 128 B. 160 C. 256 Ans- 128 Hashing involves taking a _____ length input and producing a _____ length output (message digest). A. fixed; fixed B. variable; fixed C. fixed; variable Ans- variable; fixed The hash value in bits for SHA-1 is ____. A. 128 B. 160 C. 256 Ans- 160 The hash value in bits for MD4 is ____. A. 128 B. 160 C. 256 Ans- 128 ...

WGU C839V5/D334 ADDITIONAL PRACTICE QUESTIONS AND ANSWERS 2024/2025 SOLVED 100%;(VIEW AHEAD OF EXAM STUDY TIPS GUARANTEED SUCCESS) The hash value in bits for MD5 is ____. A. 128 B. 160 C. 256 ANS- 128 Hashing involves taking a _____ length input and producing a _____ length output (message digest). A. fixed; fixed B. variable; fixed C. fixed; variable ANS- variable; fixed The hash value in bits for SHA-1 is ____. A. 128 B. 160 C. 256 ANS- 160 The hash value in bits f...

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? The Answer Is :- Operation and maintenance What is the effective key size of DES? The Answer Is :- 56 bit What are two types of ciphers? The Answer Is :- Transposition and substitution When block chaining cryptography is used, what type of code is calculated and appended to the data to ensure authenticity? The Answer Is :...

WGU C839 Pre- Assessment V1 (Latest 2024/ 2025 Update) Introduction to Cryptography| Qs & As| Grade A| 100% Correct (Verified Answers) Q: Employee A created a secret key and wants to send it to Employee B without any coworkers being able to decrypt the message.Which key needs to encrypt the message? Answer: Employee B's public key Q: Which type of cipher is ChaCha? Answer: stream Q: What is the key size for RC4 with WEP? Answer: 40 bits Q: Which sym...

XOR the following ------------------ - ️️ asymmetric key-based encryption -typical methods - ️️RSA DSA El Gamal Symmetric key-based encryption -Typical Methods - ️️RC2- 40 bit key size 64 bit block RC4- (Stream Cipher)- Used in SSL and WEP RC5- (Variable Key size, 32, 64, or 128 bit block size) AES- (128, 192 or 256 bit key size, 128 bit block size) DES- (56 bit key size. 64 bit Block size) 3DES- (112 bit key size, 64 bit block size) Block Encryption - ️️R...