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BLS Signature for Busy People

Summary

• BLS stands for

  • Barreto-Lynn-Scott: BLS12, a Pairing Friendly Elliptic Curve.
  • Boneh-Lynn-Shacham: A Signature Scheme.

• Signature Aggregation

• It is possible to verify n aggregate signatures on the same message with just 2 pairings instead of n+1.

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#!/usr/bin/env python3
'''
Simple vimgolf that downloads challenges at random and compares output
to the expected output.
'''

import feedparser, filecmp, requests, random, subprocess, tempfile

def main():
  # Select a challenge link from the challenges feed at random

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"""
Symmetric encryption tool
"""
from base64 import b64encode
import sys

def main():
  usage = "Usage: {sys.argv[0]} [test | encrypt | decrypt | crack]"

  # If no argument, print the command usage

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Cryptopuzzle

We're going to build a simple symmetric encryption scheme using the XOR function. And then we'll show how to break this encryption scheme.

This puzzle is heavily influenced by this: https://cryptopals.com/sets/1/challenges/1

If you like this puzzle, see that set of puzzles which goes much deeper

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"""
Demonstrates hybrid encryption (AES-GCM + RSA): encrypts a message
under a public key and that can only be recovered using the corresponding
secret key.

Requires: Python 2; pycryptodomex
"""
from Crypto.Cipher import AES, PKCS1_OAEP
from Crypto.PublicKey import RSA
from Crypto.Random import get_random_bytes

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"""
Quickly find paths to keys or values deeply embedded in complex structures of JSON.

Written in python 3.

Example:

sampleStructure = {
    'AmiLaunchIndex': 0,
    'Monitoring': {