Cipher feedback Study guides, Class notes & Summaries

WGU C839 Exam Questions and answers, Graded A+. VERIFIED. Which encryption standard is approved by the National Security Agency (NSA) for classified information? Advanced Encryption Standard (AES Which National Security Agency (NSA) encryption algorithms are unevaluated commercial cryptographic components? Type 4 Which method is used to verify the validity of a certificate? Online Certificate Status Protocol (OCSP) What is used to protect an encryption key and deliver it q...

Cryptography C839 Set 1. Exam Questions and answers. Graded A+ Which block cipher modes can be used to turn a block cipher into a stream cipher? Select two. Counter Mode CTR and Output Feedback Mode OFB What are reasons certificates should have an expiration date? Select all that apply 1 Decreases risk of compromise 2 To facilitate recovery from compromise 3 Creates forced opportunity fo users to update certificate information. What phase of the certificate lifecycle does cer...

What is the most effective defense against cross-site scripting attacks? a) Limiting account privileges b)User Authentication c) Input validation d)encryption - Answer c) Input validation prevents cross-site scripting attacks by limiting user input to a predefined range. This prevents the attacker from including the HTML ˂SCRIPT˃ tag in the input. What phase of the Electronic Discovery Reference Model puts evidence in a format that may be shared with others? a) production b) proces...

WGU C839 - Introduction to Cryptography Actual Exam With 100% Correct Verified AnswerAllows encryption of partial blocks ---------- Correct Answer -------- Cipher Feedback (CFB) Mode Generates keystream blocks that are XORed with the PT blocks Turns block Cipher to stream Cipher ---------- Correct Answer -------- Output Feedback (OFB) Turns block cipher into stream cipher like OFB, It generates the next keystream block by encrypting successive values of a counter ----- ----- Correc...

Messages are encrypted using different secrets, and the analyst compares the messages to figure out how the algorithm works. - ANSWER Which technique does related-key cryptanalysis use to decipher a message? Steganography - ANSWER Which type of cryptography is being used when the author uses secret inks? Payload - ANSWER What is the hidden message in a steganographic communication? By substituting each letter for the letter from the opposite end of the alphabet (i.e. A becomes Z, B become...

WGU C839 - Introduction to Cryptography Actual Exam With 100% Correct Verified AnswerAllows encryption of partial blocks ---------- Correct Answer -------- Cipher Feedback (CFB) Mode Generates keystream blocks that are XORed with the PT blocks Turns block Cipher to stream Cipher ---------- Correct Answer -------- Output Feedback (OFB) Turns block cipher into stream cipher like OFB, It generates the next keystream block by encrypting successive values of a counter ----- ----- Correc...

WGU C839 - Introduction to Cryptography Actual Exam With 100% Correct Verified AnswerAllows encryption of partial blocks ---------- Correct Answer -------- Cipher Feedback (CFB) Mode Generates keystream blocks that are XORed with the PT blocks Turns block Cipher to stream Cipher ---------- Correct Answer -------- Output Feedback (OFB) Turns block cipher into stream cipher like OFB, It generates the next keystream block by encrypting successive values of a counter ----- ----- Correc...

WGU C839 - Introduction to Cryptography Actual Exam With 100% Correct Verified AnswerAllows encryption of partial blocks ---------- Correct Answer -------- Cipher Feedback (CFB) Mode Generates keystream blocks that are XORed with the PT blocks Turns block Cipher to stream Cipher ---------- Correct Answer -------- Output Feedback (OFB) Turns block cipher into stream cipher like OFB, It generates the next keystream block by encrypting successive values of a counter ----- ----- Correc...

What type of encryption uses different keys to encrypt and decrypt the message? A Symmetric B Private key C Secure D Asymmetric - ANSWER-D The most widely used asymmetric encryption algorithm is what? A RSA B Vigenere C DES D Caesar Cipher - ANSWER-A Original, unencrypted information is referred to as ____. A text B plaintext C cleantext D ciphertext - ANSWER-B Which of the following is NOT an asymmetric system? A PGP B RSA C SSL D DES - ANSWER-D In order for ...

WGU C839 EXAM 100 REAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)|AGRADE 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 User B an encrypted message that only User B can read, User A must encrypt message with which of the following keys? A User A's public key B User A's private key C User B's public k...