WGU C839 INTRO TO CRYPTOGRAPHY OA PREPARATION COMPLETE 150 ACTUAL QUESTIONS AND CORRECT DETAILED ANSWERS (CORRECT VERIFIED ANSWERS) LATEST UPDATED VERSION

WGU C839 - k k




kIntro to Cryptography Exam Questions and Answers
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2023 - 2024 (Verified Answers)
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1. What type of encryption uses different keys to encrypt and decrypt them
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essage?


A Symmetric
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B Private key
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C Secure
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D Asymmetric ANS D
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2. The most widely used asymmetric encryption algorithm is what?
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A RSA
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B Vigenere
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C DES
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D Caesar Cipher ANS A
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3. Original, unencrypted information is referred to as
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A text
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,B plaintext
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C cleantext
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D ciphertext ANS B
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4. Which of the following is NOT an asymmetric system?
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A PGP
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B RSA
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C SSL
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D DES ANS D
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5. In order for User A to send User B an encrypted message that only User Bca
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n read, User A must encrypt message with which of the following keys?
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A User A's public key
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B User A's private key
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C User B's public key
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D User B's private key ANS C
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6. The greatest weakness with symmetric algorithms is
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A They are less secure than asymmetricB
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The problem of key exchange
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,C They are slower than asymmetric D
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The problem of generating keys ANS
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B

7. Which of the following is generally true about block sizes?
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A Smaller block sizes increase security
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B Block sizes must be more than 256 bits to be secureC
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Block size is irrelevant to security
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D Larger block sizes increase security ANS D
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8. A is a function that takes a variable-
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size input m and returns afixed-size string.
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A Symmetric cipher
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B Hash
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C Asymmetric cipher
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D Feistel ANS B
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9. Which of the following is a cryptographic protocol that allows two partiesto
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establish a shared key over an insecure channel?
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A Elliptic Curve
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B RSA
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C MD5
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D Diffie-Hellman ANS D
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10. A
is a digital representation of information that identifies youas a relevant e
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, ntity by a trusted third party?
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A Digital Signature
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B Hash
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C Ownership stamp
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D Digest ANS A
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11. What is the standard used by most digital certificates?
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A X.509
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B CRL
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C RFC 2298
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D OCSP AN
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SA
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12. DES uses keys of what size?
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