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#!/bin/bash
set -euo pipefail

BLOCKLIST_URL='https://list.iblocklist.com/?list=bt_level1&fileformat=p2p&archiveformat=gz'
BLOCKLIST_FILE=/var/packages/DownloadStation/etc/download/blocklists/level1

echo "Clean old blocklist"
rm -f $(dirname $BLOCKLIST_FILE)/*

echo "Download new blocklist"

olbat

// https://developers.cloudflare.com/workers/about/ 
// https://tutorial.cloudflareworkers.com
//
// A Service Worker which adds Security Headers.
// Checks:
//     https://securityheaders.io/
//     https://observatory.mozilla.org/
//     https://csp-evaluator.withgoogle.com/
//     https://hstspreload.org/
//     https://www.ssllabs.com/ssltest/

olbat

Cryptography I

Cryptography is an indispensable tool for protecting information in computer systems. This course explains the inner workings of cryptographic primitives and how to correctly use them. Students will learn how to reason about the security of cryptographic constructions and how to apply this knowledge to real-world applications. More ...

Week 1

This week's topic is an overview of what cryptography is about as well as our first example ciphers. You will learn about pseudo-randomness and how to use it for encryption. We will also look at a few basic definitions of secure encryption.

Introduction

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Course name: Cryptography 1 URL: https://class.coursera.org/crypto-007/class

Lectures

Week 1

Course Overview (11 min)

• HTTPS is actually not a protocol of its own. It’s simply regular HTTP on top of SSL/TLS.

olbat

Crypto Notes Week 1

The first half of the course will be about sym. enc. and the second half will be about public key enc.

Introduction and Prereqs

What is cryptography?

The core of cryptography is about:

• establishing a secret key between two parties

olbat

#!/usr/bin/python3

import sys
import unicodedata
import regex  # https://pypi.python.org/pypi/regex/

SPECIAL_CHARS = r"\-'"  # FIXME: French specific

RE_WHITESPACES = regex.compile(r"\p{Zs}+")
RE_SENTENCE_TERMS = regex.compile(r" *\p{STerm}+ *")

olbat

#!/usr/bin/python3
"""
usage: {} title data.txt [data2.txt ...] > histogram.png
"""

import sys
import math
import os.path
import matplotlib
matplotlib.use('Agg')

olbat

#!/usr/bin/env python3
"""
usage: {} < corpus.json > plot.pdf

The corpus file must contain one JSON document per line,
features must be stored in a field names "{}",
classes in a field names "{}".
"""

import sys

olbat

module Time::Measure
  refine Time.singleton_class do
    def measure(&_block)
      tstart = Process.clock_gettime(Process::CLOCK_MONOTONIC)
      yield if block_given?
      (Process.clock_gettime(Process::CLOCK_MONOTONIC) - tstart)
    end
  end
end

olbat

module Process::KillRecursive
  refine Process.singleton_class do
    def children(pid)
      pids = nil
      if RbConfig::CONFIG['host_os'] =~ /linux/i
        if File.exist?("/proc/#{pid}/task/#{pid}/children")
          pids = File.read("/proc/#{pid}/task/#{pid}/children").split(/\s/)
        end
      elsif !Gem.win_platform?
        pids = `ps --ppid #{pid} -o pid=`.split("\n")