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 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 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 C
The greatest weakness with symmetric algorithms is . A They are less secure than asymmetric
B The problem of key exchange
C They are slower than asymmetric D The problem of generating keys B
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 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 B
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 D
A is a digital representation of information that identifies you as a relevant entity by a trusted third party?
A Digital Signature B Hash
C Ownership stamp D Digest A
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