Cryptographic Implementation (SecurityX) Quiz

1. Which cryptographic protocol is used for secure key exchange over an insecure channel?

AES

Diffie-Hellman

SHA-256

HMAC

2. What is the recommended minimum key length for RSA encryption to ensure security against modern threats?

512 bits

1024 bits

2048 bits or higher

256 bits

3. In public key infrastructure (PKI), what does a certificate authority (CA) verify?

The ownership of a private key

The association between a public key and an identity

The strength of encryption

The speed of key generation

4. Which cryptographic standard specifies the use of AES for government and classified information?

FIPS 197

FIPS 186

FIPS 140-2

FIPS 180-4

5. What is a collision in the context of cryptographic hash functions?

Two different inputs producing the same hash output

Encryption key overlap

Failed authentication attempt

Network packet loss

6. In TLS/SSL protocols, which algorithm is typically used for the symmetric key exchange after the handshake?

RSA only

Diffie-Hellman or ECDHE

MD5

SHA-1

7. What is the main difference between a cipher and a hash function?

Ciphers are reversible; hashes are one-way

Hashes use longer keys

Ciphers are slower

Hashes require more memory

8. Which algorithm is part of the SHA-3 family and produces variable-length output?

SHAKE

BLAKE2

Whirlpool

Tiger

9. In the context of Cryptographic Implementation (SecurityX), what is perfect forward secrecy?

Using the same key for all sessions

Session keys are independent; compromise of long-term keys doesn't expose past sessions

Encrypting with two different algorithms

Permanent key storage without rotation

10. What does HMAC (Hash-based Message Authentication Code) provide?

Encryption and confidentiality

Message integrity and authenticity verification

Key generation only

Password hashing only

11. Which encryption algorithm uses a 256-bit key and is widely adopted for government and military applications?

AES-256

DES

RC4

Blowfish

12. What is the purpose of an initialization vector (IV) in block cipher modes?

To encrypt the key

To ensure identical plaintext blocks produce different ciphertext

To verify message authenticity

To increase key length

13. Which of the following is a key derivation function commonly used for password hashing?

PBKDF2

AES

RSA

Diffie-Hellman

14. In elliptic curve cryptography, what advantage does ECC offer compared to RSA?

Longer key lengths for equivalent security

Equivalent security with smaller key sizes

Faster key generation

No need for random number generation

15. What is the primary weakness of ECB (Electronic Codebook) mode?

Slow encryption speed

Identical plaintext blocks produce identical ciphertext blocks

Requires more memory

Cannot encrypt variable-length data

16. Which mode of operation is suitable for encrypting large amounts of data in parallel?

CBC mode

ECB mode

CTR mode

CFB mode

17. What does a digital signature provide in terms of security properties?

Confidentiality only

Authentication, non-repudiation, and integrity

Encryption of message content

Key distribution only

18. Which hashing algorithm produces a 256-bit output and is considered cryptographically secure?

MD5

SHA-1

SHA-256

CRC32

19. In RSA encryption, the public key is derived from which two prime numbers?

P and q

E and d

N and φ(n)

P and e

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

Faster processing speed

No need for secure key exchange

Smaller key sizes

Better compression ratios

SecurityX Crypto Quiz: Advanced Encryption Mastery