Cryptography and Network Security Quiz1

What are the fundamental building blocks of encryption used in DES?

• Multiplication and rotation

• Addition and division

• Substitution and permutation

• Exponentiation and reflection

What is the encryption technique that uses two instances of DES on the same plaintext?

• Single-DES

• Triple-DES

• Double-DES

• Quadruple-DES

Which encryption technique uses three instances of DES on the same plaintext?

• Quintuple-DES

• Triple-DES

• Double-DES

• Single-DES

Which concept does the Feistel cipher implement?

• ElGamal encryption

• RSA encryption

• Shannon’s S-P network

• Diffie-Hellman key exchange

What is the requirement for the generation of a sequence of random numbers to be considered statistically random?

• Non-randomness

• Predictability

• Dependent subsequence

• Uniform distribution

Which stream cipher encrypts plaintext one byte at a time?

• AES

• RC4

• Blowfish

• DES

Who designed the RC4 stream cipher in 1987?

• Ron Rivest

• Adi Shamir

• Leonard Adleman

• Whitfield Diffie

What is the key-size of RC4?

• Variable key-size

• Fixed key-size

• 256-bit key-size

• 128-bit key-size

Where is RC4 widely used?

• Web SSL/TLS

• Database encryption

• File encryption

• Email encryption

What does TRNG stand for in the context of random number generation?

• Turing Random Number Generator

• Trusted Random Number Generator

• Tactical Random Number Generator

• True Random Number Generator