ong-schnorr-shamir_digital_signature_scheme
#HackTM_CTF_Quals_2023 #good_challenges_2023 from math import gcd from Crypto.Util.number import bytes_to_long, isPrime from secret import p, q, x1, y1, x2, y2, e, flag # properties of secret variables assert isPrime(p) and p.bit_length() …
require "functions_framework" require "digest/sha2" fail unless ENV["FLAG"] key = JSON.parse(File.read("pubkey.txt")) n = key["n"].to_i k = key["k"].to_i EXPECTED_MESSAGE = 'SUNSHINE RHYTHM' FunctionsFramework.http("index") do |request| if…
#redpwnctf2021 TokyoWesterns CTF 6th 2020 | circularと全くおなじ問題設定。つまりOng-Schnorr-Shamir Digital Signature Schemeで、おなじsolverが使える #!/usr/local/bin/python from Crypto.Util.number import getPrime, bytes_to_long from Crypto.…
