Bit stream cipher - Study guides, Class notes & Summaries

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 ...

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 U...

CMSC 426 MC Final Exam Questions & Answers 2024/2025 Which of the following encryption functions has perfect secrecy? a) XOR cipher b) RC4 stream cipher c) 3DES block cipher d) One-time pad - ANSWERSd) One-time pad Which of the following describes the security of Diffie Hellman Key Exchange? a) An attacker would need to factor one of Alice or Bob's public integers in order to recover one of the private integers. b) An attacker would need to solve the discrete logarithm problem t...

Cryptography provides 5 basic protections, what are they? Confidentiality Integrity Availability Authentication Non-repudiation What are some Symmetric key disadvantages. Key management depends on all users to keep key secret Not easily scalable to large groups Symmetric key advantages. (List 2) Symmetric key algorithms are very fast High security especially with large key sizes Name 2 encryption methods. Block Cipher Stream Cipher _____ cipher encry...

XOR the following ------------------ - ANSWER asymmetric key-based encryption -typical methods - ANSWER RSA DSA El Gamal Symmetric key-based encryption -Typical Methods - ANSWER 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 - ANSW...

Cyber Security Test - Week 1 to 5 Questions and Answers Rated A+ What does cyber security refer to? Cybersecurity relates to the security of any device which is connected to some form of network such as the internet. What does information security refer to? Information security is wider than computer security because it relates to the security of any information, whether that be physical or held within a digital device. What does computer security refer to? Computer security re...

WGU C839 Introduction to Cryptography - (EC-Council CES) Latest 2024 CrypTool - Answer ️️ -Software which allows encryption of text using historic algorithms The Enigma Machine - Answer ️️ -In World War II the Germans made use of an electro- mechanical rotor based cipher Known as The Enigma Machine. Allied cipher machines used in WWII included the British TypeX and the American SIGABA. The ADFGVX Cipher - Answer ️️ -invented by Colonel Fritz Nebel in 1918. The key for this alg...

Certified Encryption Specialist Latest Update October 2024 Cryptography - Answer--The science of altering communication so that it cannot be understood without having a key. Caesar Cipher - Answer--Simple cipher that uses shifting letters. Atbash - Answer--Used by Hebrews, cipher that reverses the alphabet. ROT13 - Answer--Cipher that rotate or shifts by 13 letters. Scytale - Answer--Cylinder tool used to encrypt and decrypt plaintext using a cloth or piece of leather wrapped around a rod. ...

CRY 303c Final Exam | Questions with complete solutions Which of the following violate Kerckhoff's principle? Select all that are applicable. A. A company states that its system is "secure" because it uses confidential and proprietary protocols. B. The company password is written using an invisible ink, and only the people within the company know the fact that invisible ink is used. C. The algorithms for popular symmetric ciphers such as DES and AES are publicly known. D. The attacker has t...

CEH V11 Cheat Sheet 1 with Revised Answers Regional Registry Coverage Map - Answer-North America - ARIn South America - Lacnic Europe - Ripe Africa - AFRINIC Asia - APNIC Symmetric Encryption - Answer-Type of cryptography. secret-key, shared-key-private key.) uses same key for encryption and decryption. DES - Answer-Symmetric Algo. Data Encryption Standard - the archetypal block cipher. Designed to encipher and decipher blocks of data consisting of 64 bits under control of a 56bit key...