MariaRigaki

import ctypes
import numpy as np
from picosdk.ps2000 import ps2000 as ps
import matplotlib.pyplot as plt
from picosdk.functions import adc2mV, assert_pico2000_ok
import serial
import time

ser = serial.Serial('/dev/ttyACM0')                                                                       
ser.baudrate = 9600

MariaRigaki

Cryptopals is a set of cryptographic challenges, originally published here: https://cryptopals.com

Set 8 of the challenges was never published publicly, until late March 2018. However the cryptopals website was not updated to include the challenges. This gist compiles the 8th set of the Cryptopals challenges.

title	link
57. Diffie-Hellman Revisited: Small Subgroup Confinement	https://toadstyle.org/cryptopals/513b590b41d19eff3a0aa028023349fd.txt
58. Pollard's Method for Catching Kangaroos	https://toadstyle.org/cryptopals/3e17c7b35fcf491d08c989081ed18c9a.txt
59. Elliptic Curve Diffie-Hellman and Invalid-Curve Attacks	https://toadstyle.org/cryptopals/a0833e607878a80fdc0808f889c721b1.txt

MariaRigaki

Keybase proof

I hereby claim:

• I am mariarigaki on github.
• I am marik0 (https://keybase.io/marik0) on keybase.
• I have a public key ASCAErwL2Qf_wrwIEsng6536j0g-mCRXF31B7PSCYl1XTQo

To claim this, I am signing this object:

MariaRigaki

# The message I got from the previous step was the following:
# The last step: 4e 3f 4a 5f 3g 5f 3d 3b 4c 5f 2c 46 1e 43 2f 4h 34 1e 2c 6c 32 5b 32 57 31 30 32 2h
# From that and the hint that "16 is not enough" we had to figure out that it was base18 encoded 

# Decoder function from https://github.com/gg/integer_encoding
def decoder(alphabet):
    """
    Returns a decoder that decodes a base-`len(alphabet)` encoded sequence of
    alphabet elements into a positive integer.

MariaRigaki

import png

rdr = png.Reader('E3EA158BA24F4D9573C04A0687F47F3BA3DB096ADA14729ECF7574678733E8AF.png')
w, h, pixels, meta = rdr.read()

# read returns width, height, pixels as Map and metadata
# (600,
# 790,
# <map at 0x7ff98c07e908>,
# {'alpha': False,

MariaRigaki

# Solution for the following problem:
# 3 friends (A, B and C) play ping-pong all day.
# The winner always keeps playing. A plays 10 games, B 15, C 17. Who lost the 2nd game?
# Problem by @eldracote https://twitter.com/eldracote/status/939614390571200514

from z3 import *

# Keep track of the players results (2 means win, 1 means loss, 0 is DNP)
A = IntVector('a', 21)
B = IntVector('b', 21)

MariaRigaki

# A solution to the CUCTF 2017 Future task using Z3Py
# inspired by Hackeriet's solution in https://blog.hackeriet.no/solution-to-tuctf-2017-future/
from z3 import *

# This is the flag format
# flag = "TUCTF{..................}"

auth = [0x8b, 0xce, 0xb0, 0x89, 0x7b, 0xb0, 0xb0, 0xee, 0xbf, 0x92, 0x65, 0x9d, 0x9a, 0x99, 0x99, 0x94, 0xad, 0xe4, 0x00]

# Declare the variables for Z3

MariaRigaki

# The base code was taken from https://gist.github.com/karpathy/a4166c7fe253700972fcbc77e4ea32c5
import numpy as np
import gym
from keras import models
from keras.models import Sequential
from keras.layers import Dense
from keras.optimizers import RMSprop


# hyperparameters