#UMASS_CTF_2022 #!/usr/bin/env python3 # # Polymero # # Imports import os # Local imports with open('flag.txt','rb') as f: FLAG = f.read() f.close() def bytes_to_mat(x): assert len(x) == 32 bits = list('{:0256b}'.format(int.from_bytes(x,'b…

#pbctf_2021 #rbtree #!/usr/bin/env python3 import random from flag import flag def keygen(ln): # Generate a linearly independent key arr = [ 1 << i for i in range(ln) ] for i in range(ln): for j in range(i): if random.getrandbits(1): arr[j…