Question

TEA cipher uses which of the following structure?

(a) standard cipher structure

(b) pseudo random structure

(c) feistel structure

(d) block structure

This question was addressed to me in an online quiz.

Origin of the question is Cryptography in portion Number Theory and Cryptography of Discrete Mathematics

Answer 1

The correct answer is (c) feistel structure

The explanation: The Feistel structure system TEA operates on two 32-bit unsigned integer numbers. It uses a 128-bit key that can be used to build a simple key schedule by mixing all of the key elements.