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Chapter 3 - Basic Cryptography

Terms in this set (82)

C. encrypts the key and the message
The Hashed Message Authentication Code (HMAC) _____.
A. encrypts only the message
B. encrypts only the key
C. encrypts the key and the message
D. encrypts the DHE key only
B. SHA-3
What is the latest version of the Secure Hash Algorithm?
A. SHA-2
B. SHA-3
C. SHA-4
D. SHA-5
C. ROT13
Alexei was given a key to a substitution cipher. The key showed that the entire alphabet was rotated 13 steps. What type of cipher is this?
A. AES
B. XAND13
C. ROT13
D. Alphabetic
C. 0
Abram was asked to explain to one of his coworkers the XOR cipher. He showed his coworker an example of adding two bits, 1 and 1. What is the result of this sum?
A. 2
B. 1
C. 0
D. 16
C. Diffie-Hellman (DH)
Which of the following key exchanges uses the same keys each time?
A. Diffie-Hellman-RSA (DHRSA)
B. Diffie-Hellman Ephemeral (DHE)
C. Diffie-Hellman (DH)
D. Elliptic Curve Diffie-Hellman (ECDH)
B. perfect forward secrecy
Public key systems that generate random public keys that are different for each session are called _____.
A. Public Key Exchange (PKE)
B. perfect forward secrecy
C. Elliptic Curve Diffie-Hellman (ECDH)
D. Diffie-Hellman (DH)
B. plaintext
What is data called that is to be encrypted by inputting it into a cryptographic algorithm?
A. opentext
B. plaintext
C. cleartext
D. ciphertext
B. risk loss
Which of these is NOT a basic security protection for information that cryptography can provide?
A. authenticity
B. risk loss
C. integrity
D. confidentiality
D. in the directory structure of the file system
Which areas of a file cannot be used by steganography to hide data?
A. in areas that contain the content data itself
B. in the file header fields that describe the file
C. in data that is used to describe the content or structure of the actual data
D. in the directory structure of the file system
A. non-repudiation
Proving that a user sent an email message is known as _____.
A. non-repudiation
B. repudiation
C. integrity
D. availability
C. digest
A(n) _____ is not decrypted but is only used for comparison purposes.
A. key
B. stream
C. digest
D. algorithm
A. Collisions should be rare.
Which of these is NOT a characteristic of a secure hash algorithm?
A. Collisions should be rare.
B. A message cannot be produced from a predefined hash.
C. The results of a hash function should not be reversed.
D. The hash should always be the same fixed size.
B. confusion
Alyosha was explaining to a friend the importance of protecting a cryptographic key from cryptoanalysis. He said that the key should not relate in a simple way to the cipher text. Which protection is Alyosha describing?
A. diffusion
B. confusion
C. integrity
D. chaos
C. Advanced Encryption Standard
Which of these is the strongest symmetric cryptographic algorithm?
A. Data Encryption Standard
B. Triple Data Encryption Standard
C. Advanced Encryption Standard
D. RC 1
C. Alice's public key
If Bob wants to send a secure message to Alice using an asymmetric cryptographic algorithm, which key does he use to encrypt the message?
A. Alice's private key
B. Bob's public key
C. Alice's public key
D. Bob's private key
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