from Crypto.Util.number import * p = getPrime(256) q = getPrime(256) n = p * q e = 0x69420 flag = bytes_to_long(open("flag.txt", "rb").read()) print("n =",n) print("e =", e) print("ct =",(flag * e) % n)
RSAじゃないし
n = 5496273377454199065242669248583423666922734652724977923256519661692097814683426757178129328854814879115976202924927868808744465886633837487140240744798219 e = 431136 ct = 3258949841055516264978851602001574678758659990591377418619956168981354029697501692633419406607677808798749678532871833190946495336912907920485168329153735 d = pow(e, -1, n) m = ct * d % n print(m.to_bytes(100, "big"))
