outputs random strings of various lengths

randstrings.rb

### Usage
# download or copy this file to your unix computer
# open terminal
# $ cd <path to the directory which has randostrings.rb>
# $ ruby randstrings.rb

require 'securerandom'
length = 16
4.times do
  puts "a random string which is #{length} chars length"
  puts SecureRandom.hex(length / 2)
  length *= 2
end