Question 1

What is the primary goal of cryptography?

Accepted Answer

Data integrity

Answer

Data redundancy

Answer

Data breach

Answer

Data replication

Question 2

Which discipline of cryptology involves developing and using codes for private communication?

Accepted Answer

Cryptography

Answer

Cryptanalysis

Answer

Cryptobotany

Answer

Cryptosynthesis

Question 3

Which type of cipher rearranges letters without replacing them?

Accepted Answer

Transposition cipher

Answer

Substitution cipher

Answer

Block cipher

Answer

Polyalphabetic cipher

Question 4

What method does a cryptanalyst use when having access to only the ciphertext of several messages?

Accepted Answer

Ciphertext

Answer

Chosen-plaintext

Answer

Known-plaintext

Answer

Brute-force

Question 5

What is the primary factor ensuring the security of encryption in modern technology?

Accepted Answer

Length of the key

Answer

Length of the plaintext

Answer

Availability of the ciphertext

Answer

Complexity of the algorithm

Question 6

What cryptographic function is used to verify and ensure data integrity?

Accepted Answer

Hashing

Answer

Decryption

Answer

Encryption

Answer

Encoding

Question 7

Which property must a cryptographic hash function possess?

Accepted Answer

Collision-free

Answer

Ease of computation for any input

Answer

Reversible

Answer

Variable output length

Question 8

Which hashing algorithm is similar to MD5 hash functions?

Accepted Answer

SHA-1

Answer

MD5

Answer

SHA-512

Answer

SHA-256

Question 9

What additional element does HMAC use to add authentication to data integrity?

Accepted Answer

Secret key

Answer

Private key

Answer

Public key

Answer

Hash value

Question 10

Which encryption algorithm uses the same key for both encryption and decryption?

Accepted Answer

Symmetric encryption

Answer

Asymmetric encryption

Answer

Private-key encryption

Answer

Public-key encryption

Question 11

What is the primary advantage of asymmetric encryption over symmetric encryption?

Accepted Answer

Stronger security

Answer

Less resource-intensive

Answer

Simpler key management

Answer

Faster processing speed

Question 12

Which asymmetric algorithm is commonly used for digital signatures?

Accepted Answer

RSA

Answer

DES

Answer

SHA

Answer

AES

Question 13

What technique allows two computers to generate a shared secret without having communicated before?

Accepted Answer

Diffie-Hellman

Answer

RSA

Answer

HMAC

Answer

AES

Question 14

What is the primary purpose of digital certificates in a PKI?

Accepted Answer

Verifying identity

Answer

Securing network traffic

Answer

Generating hash values

Answer

Encrypting data

Question 15

Which topology involves individual CAs establishing trust relationships with other CAs?

Accepted Answer

Cross-certified CA

Answer

Single-root PKI

Answer

Hierarchical CA

Answer

Symmetric CA

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