marcoonroad

// Windows equivalent to Linux/Mac: echo $(head -c 64 /dev/urandom | base64 | tr -d '\n')

// Get-Random in Windows 10/Server 2016 PowerShell uses a CSPRNG seed by default.
// Prior to PS 5.1, seed was system clock.

// For Win 10/2016+
powershell -command "[Convert]::ToBase64String((1..64|%{[byte](Get-Random -Max 256)}))"

// For Win 8.x/2012
powershell -command "$r=[byte[]]::new(64);$g=[System.Security.Cryptography.RandomNumberGenerator]::Create();$g.GetBytes($r);[Convert]::ToBase64String($r)"

marcoonroad

<div class="wrapper">
  <div>
    <div class="spin-text">
      <div><span>123456</span></div>
    </div>
    <div class="spin-wrapper"><div>
      <div class="spin-container spin-cursor-container">
        <div class="spin spin-cursor"></div>
      </div>
      <div class="spin-container spin-slices-container">

marcoonroad

<script src="https://unpkg.com/@otplib/preset-browser@^12.0.0/buffer.js"></script>
<script src="https://unpkg.com/@otplib/preset-browser@^12.0.0/index.js"></script>
<div class="wrapper">
  <div class="noop">
    <div class="background-spin-loop"></div>
    <div class="spin-text">
      <div><span id="otp-code">123456</span></div>
    </div>
    <div class="spin-wrapper">
      <div class="noop">

marcoonroad

<div class="wrapper">
  <div>
    <div class="spin-text">
      <div><span>123456</span></div>
    </div>
    <div class="spin-wrapper">
      <div>
        <div class="spin-container spin-cursor-container">
          <div class="spin spin-cursor"></div>
        </div>

marcoonroad

<div class="wrapper">
  <div>
    <div class="spin-text">
      <div><span>123456</span></div>
    </div>
    <div class="spin-wrapper">
      <div>
        <div class="spin-container spin-cursor-container">
          <div class="spin spin-cursor"></div>
        </div>

marcoonroad

#!/usr/bin/env python3

# Challenge available at:
#   https://www.hackerrank.com/challenges/missing-stock-prices/problem

import pandas
import numpy

count = int(input().strip())

marcoonroad

#!/usr/bin/env python3

# Challenge available at:
#    https://www.hackerrank.com/challenges/temperature-predictions/problem

import pandas
import numpy

count = int(input().strip())
input()

marcoonroad

let shuffle list =
  let cmp _ _ = (Random.int 3) - 1 in
  List.sort cmp list;;

let share ~secret ~length =
  let rec loop secret length buffer =
    if length <= 0 then secret :: buffer else
    let noise = Random.bits () in
    let piece = secret lxor noise in
    loop piece (length - 1) (noise :: buffer)

marcoonroad

JavaScript Crypto Libraries

I start with a list and plan to create a comparison table.

WebCryptoAPI

http://www.w3.org/TR/WebCryptoAPI/

This specification describes a JavaScript API for performing basic cryptographic operations in web applications, such as hashing, signature generation and verification, and encryption and decryption. Additionally, it describes an API for applications to generate and/or manage the keying material necessary to perform these operations. Uses for this API range from user or service authentication, document or code signing, and the confidentiality and integrity of communications.

marcoonroad

Merkle-less, Homomorphic Hash-based Infinite-time Stateless Digital Signatures

We will use the following terms:

pk   is public key
sk   is private key (secret key)
H    is hash function
sig  is message signature
m is plain-text message