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WorksheetsCryptography Quiz
Total questions: 40
Worksheet time: 27mins
Alec wants to send Becky an encrypted message using asymmetric encryption.
What does Alec encrypt the message with?
Alec's private key
Becky's private key
Alec's public key
Becky's public key
Stella sends Priscilla an encrypted message using asymmetric keys.
Which key is used to verify Stella's message?
Stella's public key
Priscilla's public key
Stella's private key
Priscilla's private key
Which block cipher mode converts the block cipher into a self-synchronizing stream cipher?
CFB
OFB
EFB
CTR
Which block cipher mode converts the block cipher to a synchronous stream output?
CFB
OFB
ECB
CTR
In asymmetric encryption, which key is used to encrypt the data?
Private key
Symmetric key
Public key
Session key
In which type of encryption is the same key used to encrypt and decrypt data?
public
asymmetric
symmetric
private
What alternative term can be used to describe asymmetric cryptographic algorithms?
public key cryptography
user key cryptography
private key cryptography
cipher-text cryptography
Which block cipher mode converts the block cipher into a stream cipher?
CFB
OFB
ECB
CTR
Which block cipher generates a counter value and a nonce?
CFB
CBC
CTR
OFB
Which block cipher mode produces the same ciphertext output every time the same plaintext is encrypted?
CFB
OFB
CBC
ECB
Which block cipher mode incorporates an initialization vector and XORs the previous block with the plaintext of the current block?
CFB
CBC
OFB
CTR
Which block cipher mode XORs data blocks with the encrypted version of the IV value?
CFB
OFB
CBC
CTR
Which block cipher codes use initialization vectors (IV)?
CTR
EFB
CFB
OFB
CBC
Which key/certificate management stage includes registration, key pair generation, certificate creation and certificate/key distribution, certificate dissemination, and key backup?
Cancellation
Initialization
Authentication
Issued
Which key/certificate management stage includes certificate retrieval, certificate validation, key recovery and key update?
Availability
Cancellation
Issued
Initialization
Which stage of key/certificate management includes expiration, certificate revocation, key history and key archiving.
Cancellation
Issued
Initialization
Authorization
(a) is an alternative to the Certificate Revocation List (CRL).
Which cryptographic method maps each character to a keyword?
Vigenere
Caesar
Pigpen
BIFID
Which cryptographic method involves replacing plaintext by a letter some fixed number of positions down the alphabet?
Caesar
Vigenere
Playfair
Pigpen
Which cryptographic code uses a 5x5 matrix containing the alphabet less the letter J?
Playfair
BIFID
Pigpen
Four-square Cipher
Which cryptographic method uses four 5x5 matrices arranged in a square and 25 letters encoding/decoding?
Four-square Cipher
Playfair
Pigpen
BIFID
Which cryptographic method uses a grid to map letters into numeric values?
BIFID
Playfair
Four-square Cipher
Vigenere
Which cryptographic method uses a polyalphabetic substitution cipher with a secret key?
Enigma Machine
Morse Code
One Time Pad
Rail Code
Which cryptographic method scrambles text by writing it in a sequence across a number of rails?
Rail Code
BIFID
Pigpen
Enigma Machine
Hashing Concepts:
What occurs when two different input values produce the same hash signature?
(a)
Hashing Concepts:
What occurs when part of the message has some significance to the original and generates the same hash signature?
(a)
Hashing Concepts:
What occurs when An alternative message is created with the same hash signature and has a direct relation to the original message?
(a)
Hashing Concepts:
Addresses brute forcing of an MD5 hash by iterating the hash value 1,000 times and includes a salted value
(a)
Hashing Concepts:
Allows a new unique password to be created for each instance, based on an initial seed
(a)
Hashing Concepts:
Creates a new unique passcode for each instance, based on an initial seed and a given time period
(a)
Hashing Concepts:
Creates a new unique passcode for each instance, based on a counter value and an initial seed.
(a)
Hashing Concepts:
A message authentication code that verifies the integrity and authentication of the message by hashing with a secret key
(a)
Hashing Concepts:
Produces a 160-bit signature, does not have a salted value, and is open to rainbow table and brute force attacks
(a)
Hashing Concepts:
A collection of precomputed hash values of actual plaintext passwords used for password cracking
(a)
Which of the following encryption methods is the fastest?
symmetric stream encryption
symmetric block encryption
hashing
AES
What wireless protocol uses RC4 encryption method with a 40-bit key size and a 24-bit IV?
(a)
What wireless protocol uses TKIP + RC4 with a 128-bit key size and 48-bit IV?
(a)
What wireless protocol uses AES-CCMP with a 128-bit key size and 48-bit IV?
(a)
Which wireless protocol includes a Message Integrity Check (MIC)?
WPA Enterprise
WPA
WPA2
WEP
What key size does ChaCha use?
512
128
256
192
