WGU C839 - Intro to Cryptography Exam

WGU C839 - Intro to Cryptography Exam Questions and Answers 2023 - 2024 (Verified Answers) 1.What type of encryption uses different keys to encrypt and decrypt the message?A Symmetric B Private key C Secure D Asymmetric ANS D 2.The most widely used asymmetric encryption algorithm is what?

A RSA B Vigenere C DES D Caesar Cipher ANS A 3.Original, unencrypted information is referred to as . 1 / 4

A text B plaintext C cleantext D ciphertext ANS B 4.Which of the following is NOT an asymmetric system?

A PGP B RSA C SSL

D DES ANS D

5.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 key D User B's private key ANS C 6.The greatest weakness with symmetric algorithms is .A They are less secure than asymmetric B The problem of key exchange 2 / 4

C They are slower than asymmetric D The problem of generating keys ANS B 7.Which of the following is generally true about block sizes?A Smaller block sizes increase security B Block sizes must be more than 256 bits to be secure C Block size is irrelevant to security D Larger block sizes increase security ANS D

• 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 ANS B 9.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 Diffie-Hellman ANS D

• Ais a digital representation of information that identifies 3 / 4

you as a relevant entity by a trusted third party?A Digital Signature B Hash C Ownership stamp D Digest ANS A 11.What is the standard used by most digital certificates?

A X.509

B CRL

C RFC 2298

D OCSP

ANS A 12.DES uses keys of what size?

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