#asisctffinals2021 #!/usr/bin/env python3 from Crypto.Util.number import * from flag import flag def genparam(nbit): while True: a, b = getRandomRange(2, nbit), getRandomRange(32, nbit) if (a ** b).bit_length() == nbit: return a ** b def g…

#asisctffinals2021 #!/usr/bin/env sage from sage.all import * from Crypto.Util.number import * from secret import gen_prime, gen_base_matrix, flag def keygen(nbit, l): # ## Create the n-bit prime and base square matrix of size l over Ring …