Quan Doan quandqn

## TwinPeaks2_slide_attack.py
"""
Slide attack on the TwinPeaks2 cipher from NSUCRYPTO.

Disclaimer: this is not an optimal solution, just a proof-of-concept!

An actual solution is to note that Reverse(Encrypt(Reverse(x)) = Decrypt(x), where Reverse(a,b,c,d) = (d,c,b,a).
"""

from random import shuffle, randint

## 0_solve.py
#-*- coding:utf-8 -*-

'''
In the challenge we are given a recently proposed cryptosystem
based on Mersenne primes ( https://eprint.iacr.org/2017/481 ).

The cryptosystem was broken quickly in https://eprint.iacr.org/2017/522.pdf
using random partitioning and LLL. Here this attack is implemented.

'''
	"""
	Slide attack on the TwinPeaks2 cipher from NSUCRYPTO.

	Disclaimer: this is not an optimal solution, just a proof-of-concept!

	An actual solution is to note that Reverse(Encrypt(Reverse(x)) = Decrypt(x), where Reverse(a,b,c,d) = (d,c,b,a).
	"""

	from random import shuffle, randint
	#-- coding:utf-8 --

	'''
	In the challenge we are given a recently proposed cryptosystem
	based on Mersenne primes ( https://eprint.iacr.org/2017/481 ).

	The cryptosystem was broken quickly in https://eprint.iacr.org/2017/522.pdf
	using random partitioning and LLL. Here this attack is implemented.

	'''