MCQs on Lightweight Cryptography (from 5.2.2 content)

What is the main purpose of Lightweight Cryptography (LWC)?

• To make cryptography weaker

• To design ciphers for constrained devices

• To replace AES completely

• To remove encryption entirely

Which technology development has increased the need for lightweight cryptography?

• Cloud computing

• Blockchain

• Internet of Things (IoT)

• Artificial Intelligence

What kind of devices is LWC mainly designed for?

• Supercomputers

• Smartphones

• Smart objects with limited resources

• Desktop computers

Which of the following is NOT a constraint in IoT devices?

• Low computation

• High memory

• Limited battery

• Small storage

The term "lightweight" in LWC means:

• Low security

• Small footprint and low power consumption

• Fast only in hardware

• Low key length only

Which standard cryptographic algorithm is often inefficient for IoT devices?

• RSA

• AES

• DES

• Blowfish

In symmetric-key cryptography, the same key is used for:

• Encryption only

• Decryption only

• Both encryption and decryption

• Key exchange

Block ciphers work on:

• Continuous bit streams

• Fixed-size groups of bits

• One character at a time

• Random-length messages

A stage in each round of PRESENT?

• Feistel function

• Diffusion layer

• Substitution layer

• Initial permutation

What is the full form of TEA?