#UnionCTF from Crypto.Util.number import bytes_to_long from secrets import k, FLAG assert k < 2^128 assert FLAG.startswith(b'union{') E = EllipticCurve(QQ,[0,1,0,78,-16]) P = E(1,8) Q = k*P R = (k+1)*P p = Q[0].numerator() q = R[0].numerat…

#UnionCTF 一般線形群上の離散対数問題 そしてこれは行列が対角化#### できないときには解ける import os from hashlib import sha1 from random import randint from Crypto.Cipher import AES from Crypto.Util.Padding import pad, unpad FLAG = b"union{…

#UnionCTF man in the middleらしい

#UnionCTF #!/usr/bin/env python3 from secrets import flag, musical_key from Crypto.Util.number import isPrime import math def sieve_for_primes_to(n): # Copyright Eratosthenes, 204 BC size = n//2 sieve = [1]*size limit = int(n**0.5) for i i…