| #data derived from http://www.data-compression.com/english.html | |
| freqs = {'a': 0.080642499002080981, 'c': 0.026892340312538593, 'b': 0.015373768624831691, 'e': 0.12886234260657689, 'd': 0.043286671390026357, 'g': 0.019625534749730816, 'f': 0.024484713711692099, 'i': 0.06905550211598431, 'h': 0.060987267963718068, 'k': 0.0062521823678781188, 'j': 0.0011176940633901926, 'm': 0.025009719347800208, 'l': 0.041016761327711163, 'o': 0.073783151266212627, 'n': 0.069849754102356679, 'q': 0.0010648594165322703, 'p': 0.017031440203182008, 's': 0.063817324270355996, 'r': 0.06156572691936394, 'u': 0.027856851020401599, 't': 0.090246649949305979, 'w': 0.021192261444145363, 'v': 0.010257964235274787, 'y': 0.01806326249861108, 'x': 0.0016941732664605912, 'z': 0.0009695838238376564} | |
| sum_f_squared = 0.0 | |
| sum_f = 0.0 | |
| for key in freqs: | |
| sum_f += freqs[key] | |
| sum_f_squared += freqs[key]**2 | |
| print sum_f |
Based on: https://bitsdeep.com/posts/attacking-rsa-for-fun-and-ctf-points-part-1/
Problem 1: https://gist.github.com/AndyNovo/6eda8eacec807d8e701b895da7c12986
Problem 2: https://gist.github.com/AndyNovo/bda0a57e57b5a567d0f60d9197c34857
Problem 3: https://gist.github.com/AndyNovo/38110bcfa0ffb41d0764857c931fe02d
| PRAGMA foreign_keys=OFF; | |
| BEGIN TRANSACTION; | |
| CREATE TABLE users (username text, pwd text); | |
| INSERT INTO "users" VALUES('admin','5743abddddfa08c1e3a99fdebc2e8f3f1108fa12dcd2a8f58a42f141418c22ec'); | |
| INSERT INTO "users" VALUES('student','5e884898da28047151d0e56f8dc6292773603d0d6aabbdd62a11ef721d1542d8'); | |
| COMMIT; |
| /give @p minecraft:writable_book{pages:["/say Welcome to Minestax","/scoreboard objectives add udctf dummy","/scoreboard players set 1 udctf 1","/scoreboard players set 0 udctf 0","/execute at @e[type=minecraft:armor_stand,nbt={\"Tags\":[\"idx\"]}] run fill ~ ~ ~-200 ~ ~64 ~200 air replace","/kill @e[type=minecraft:armor_stand,nbt={\"Tags\":[\"idx\"]}]","/summon minecraft:armor_stand ~10 ~ ~ {CustomNameVisible:1b,CustomName:\"\\\"idx\\\"\",Tags:[\"idx\"],HandItems:[{id:white_concrete_powder,Count:1b},{id:black_concrete_powder,Count:1b}]}","/execute at @e[type=minecraft:armor_stand,nbt={\"Tags\":[\"idx\"]}] run setblock ~ ~-1 ~ minecraft:white_concrete_powder replace", "/data modify block ~-4 ~ ~ Items set value [{Slot:0b,id:writable_book,Count:1b,tag:{pages:[\"data modify block ~-4 ~ ~ Items[0].tag.pages set from block ~-4 ~ ~ Items[3].tag.pages\", \"say run\"]}},{Slot:1b,id:writable_book,Count:1b,tag:{pages:['l','i','i','d','s','d','s','d','s','s','l','l','i','i','i','s','c','l','i','s','c','l','i','i','s',' |
| #put a black and white PNG in the same directory (replace helloworld.png) and copy the output into a command block | |
| template = """/give @p minecraft:writable_book{pages:["/say Welcome to Minestax","/scoreboard objectives add udctf dummy","/scoreboard players set 1 udctf 1","/scoreboard players set 0 udctf 0","/execute at @e[type=minecraft:armor_stand,nbt={\"Tags\":[\"idx\"]}] run fill ~ ~ ~-200 ~ ~64 ~200 air replace","/kill @e[type=minecraft:armor_stand,nbt={\"Tags\":[\"idx\"]}]","/summon minecraft:armor_stand ~10 ~ ~ {CustomNameVisible:1b,CustomName:\"\\\"idx\\\"\",Tags:[\"idx\"],HandItems:[{id:white_concrete_powder,Count:1b},{id:black_concrete_powder,Count:1b}]}","/execute at @e[type=minecraft:armor_stand,nbt={\"Tags\":[\"idx\"]}] run setblock ~ ~-1 ~ minecraft:white_concrete_powder replace", "/data modify block ~-4 ~ ~ Items set value [{Slot:0b,id:writable_book,Count:1b,tag:{pages:[\"data modify block ~-4 ~ ~ Items[0].tag.pages set from block ~-4 ~ ~ Items[3].tag.pages\", \"say run\"]}},{Slot:1b,id:writab |
| import urllib2, ssl | |
| response = urllib2.urlopen("https://vip.udel.edu/crypto/mobydick.txt", context=ssl._create_unverified_context()) | |
| mobytext = response.read() | |
| onlyletters = filter(lambda x: x.isalpha(), mobytext) | |
| loweronly = onlyletters.lower() | |
| frequency = {} | |
| for ascii in range(ord('a'), ord('a')+26): |
| import random | |
| import urllib2 | |
| f=file('quotes.txt','r') | |
| quotes = [l.strip() for l in f] | |
| f.close() | |
| quotes = [w + chr(random.randint(ord('A'),ord('Z'))) if len(w) % 2 == 1 else w for w in quotes] | |
| res = urllib2.urlopen('https://raw.githubusercontent.com/first20hours/google-10000-english/master/google-10000-english-usa.txt') | |
| words = res.read().split() |
| #include<iostream> | |
| using namespace std; | |
| string prompt_user(string input_prompt){ | |
| string reply; | |
| cout << input_prompt << endl; | |
| cin >> reply; //only use one of these two lines. | |
| //getline(cin, reply); | |
| return reply; | |
| }; |
| import hashlib, cProfile | |
| f=file('dictionary.txt','r') | |
| words = [word.strip() for word in f] | |
| f.close() | |
| secretHash=hashlib.sha512("banana").hexdigest() | |
| def checkDictionary(secret): | |
| return [word for word in words if hashlib.sha512(word).hexdigest() == secret] |
A Pen by Gregory Orton on CodePen.