Question

If Oscar wishes to carry out a brute-force attack on a block cipher with a key length of 99 bits and 50-bits blocks of plaintext-ciphertext, on average Oscar needs to check t- plaintext-ciphertext pairs to eliminate false positives. What is t in this scenario

Answer 1

value of t = 3

Step-by-step explanation:

Given data :

Key length = 99 bits

50-bits blocks of plaintext-ciphertext

Oscar needs to check t- plaintext-ciphertext pair

In this scenario The value of t = 3 and this is because there are

Complexity
`2^(75.710)` encryptions on a full KTANTAN32 Cipher and also there are 3 plaintext/ciphertext pairs